COSEWIC Assessment and Status Report on the Aweme Borer in Canada
Table of Contents
Assessment and Status Report
Committee on the Status
of Endangered Wildlife
Comité sur la situation
des espèces en péril
COSEWIC status reports are working documents used in assigning the status of wildlife species suspected of being at risk. This report may be cited as follows:
COSEWIC 2006. COSEWIC assessment and status report on the Aweme Borer Papaipema aweme in Canada. Committee on the Status of Endangered Wildlife in Canada. Ottawa. vi + 25 pp.
(Species at Risk Status Reports)
COSEWIC would like to acknowledge Gary G. Anweiler for writing the status report on the Aweme Borer Papaipema aweme in Canada, prepared under contract with Environment Canada, overseen and edited by Theresa B. Fowler, Co-chair (Arthropods), COSEWIC Arthropods Species Specialist Subcommittee.
For additional copies contact:
c/o Canadian Wildlife Service
Également disponible en français sous le titre Évaluation et Rapport de situation du COSEPAC sur le perce-tige d’Aweme (Papaipema aweme) au Canada.
Aweme Borer -- Provided by the author.
© Her Majesty the Queen in Right of Canada 2006
Catalogue No.: CW69-14/462-2006E-PDF
Assessment Summary – April 2006
Reason for designation:
Prior to the collection of one specimen in Ontario in 2005, this moth was last collected 70 years earlier. It is known from only five localities globally, three of which are in Canada. Although the species is poorly known, it is apparently restricted to a rare, fragmented and threatened habitat. Repeated collecting at all of the historic locations has not resulted in relocation of the species, and intensive collecting in the vicinity of the recent record has not yielded any additional specimens.
Designated Endangered in April 2006. Assessment based on a new status report.
The Aweme Borer is a noctuid (cutworm or owlet) moth belonging to a subgroup known as the borers. It was described from two specimens collected in 1905 at Aweme, Manitoba, in or near present-day Spruce Woods Provincial Park. The genus Papaipema, to which the Aweme Borer belongs, occurs only in North America and is one of the largest noctuid genera, with about fifty describedspecies.
Adult Aweme Borers are medium-size (33-37 mm wingspan), yellowish or pinkish-brown moths with darker brown markings on the forewings. They are difficult to identify by non-experts. There are no described subspecies. The early stages (egg, larva and pupa) are unknown.
The Aweme Borer is known from only five localities: Aweme, Manitoba; Grand Bend and Manitoulin Island, Ontario; Beaver Island, Michigan; and Rochester, New York. The Manitoba site is in the Prairie Ecological Area and the Ontario sites are within the Great Lakes Plain Ecozone. The area of occupancy (AO) in Canada is estimated at a maximum of about 625 km2.
The exact locations of the sites where the few specimens were collected in the early 1900s are unknown, and the specific habitat where they occurred is also unknown. Available historical evidence suggests the specimens were associated with sand dune habitats. The only specimen collected in the past 70 years was collected in a remnant oak-prairie fragment. All collection sites are located along former or present shorelines of glacial Lake Agassiz or one of the Great Lakes.
Almost nothing is known regarding the biology of the Aweme Borer. It is nocturnal and at least weakly attracted to light. There is a single annual generation, with the adults flying in August. The larvae of all members of the genus Papaipema bore into, and live within, the stems, roots or branches of the host plant. The larval host plant of the Aweme Borer is not known.
Population Sizes and Trends
Aweme Borers are known from only seven specimens collected at five sites in North America. Six of these specimens were collected over a period of 31 years ending in 1936. The most recent specimen was captured almost 70 years later in 2005 in Ontario.
Limiting Factors and Threats
Loss of habitat and particularly loss of colonies of the unknown host plant are the most likely limiting factors for the species. Fire and predation of pupae by small mammals have been identified as particular threats to Papaipema populations in general. A small number of individuals distributed in widely separated and highly fragmented habitat is also known to increase the possibility of extirpation of a species.
Special Significance of the Species
The Aweme Borer is an extremely rarely encountered insect. More than half of the known collection sites and two-thirds of the known specimens are Canadian.
Both historical Canadian collection sites are probably located within Provincial Parks: Spruce Woods Provincial Park, Manitoba and The Pinery Provincial Park, Ontario. The only recent collection was made on private property.
COSEWIC History, Mandate, Membership and Definitions
The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) was created in 1977 as a result of a recommendation at the Federal-Provincial Wildlife Conference held in 1976. It arose from the need for a single, official, scientifically sound, national listing of wildlife species at risk. In 1978, COSEWIC designated its first species and produced its first list of Canadian species at risk. Species designated at meetings of the full committee are added to the list. On June 5th 2003, the Species at Risk Act (SARA) was proclaimed. SARA establishes COSEWIC as an advisory body ensuring that species will continue to be assessed under a rigorous and independent scientific process.
The Committee on the Status of Endangered Wildlife in Canada (COSEWIC) assesses the national status of wild species, subspecies, varieties, or other designatable units that are considered to be at risk in Canada. Designations are made on native species for the following taxonomic groups: mammals, birds, reptiles, amphibians, fishes, arthropods, molluscs, vascular plants, mosses, and lichens.
COSEWIC comprises members from each provincial and territorial government wildlife agency, four federal entities (Canadian Wildlife Service, Parks Canada Agency, Department of Fisheries and Oceans, and the Federal Biodiversity Information Partnership, chaired by the Canadian Museum of Nature), three non-government science members and the co-chairs of the species specialist subcommittees and the Aboriginal Traditional Knowledge subcommittee. The Committee meets to consider status reports on candidate species.
- Wildlife Species
- A species, subspecies, variety, or geographically or genetically distinct population of animal, plant or other organism, other than a bacterium or virus, that is wild by nature and it is either native to Canada or has extended its range into Canada without human intervention and has been present in Canada for at least 50 years.
- Extinct (X)
- A wildlife species that no longer exists.
- Extirpated (XT)
- A wildlife species no longer existing in the wild in Canada, but occurring elsewhere.
- Endangered (E)
- A wildlife species facing imminent extirpation or extinction.
- Threatened (T)
- A wildlife species likely to become endangered if limiting factors are not reversed.
- Special Concern (SC)Footnote 1
- A wildlife species that may become a threatened or an endangered species because of a combination of biological characteristics and identified threats.
- Not at Risk (NAR)Footnote 2
- A wildlife species that has been evaluated and found to be not at risk of extinction given the current circumstances.
- Data Deficient (DD)Footnote 3
- A category that applies when the available information is insufficient (a) to resolve a species' eligibility for assessment or (b) to permit an assessment of the species' risk of extinction.
Canadian Wildlife Service
The Canadian Wildlife Service, Environment Canada, provides full administrative and financial support to the COSEWIC Secretariat.
- Footnote 1
Formerly described as "Vulnerable" from 1990 to 1999, or "Rare" prior to 1990.
- Footnote 2
Formerly described as "Not In Any Category", or "No Designation Required."
- Footnote 3
Formerly described as "Indeterminate" from 1994 to 1999 or "ISIBD" (insufficient scientific information on which to base a designation) prior to 1994. Definition of the (DD) category revised in 2006.
Lists of Figures, Tables and Appendices
List of Figures
- Figure 1: Adult Male Aweme Borer
- Figure 2: Collection Sites for the Aweme Borer
- Figure 3: Aweme, Manitoba, Type Locality for Aweme Borer
- Figure 4: Prairie Openings in Aspen and Oak “barrens” on Stabilized Sand Hills, Spruce Woods Provincial Park
- Figure 5: Moth Trap in Patch of Liatris sp., a Potential Host Plant for the Aweme Borer, Growing in Grassland Opening on Vegetated Sand Hills, Spruce Woods Provincial Park
- Figure 6: Early Stages of Dune Stabilization by Native and Introduced Vegetation, Spirit Dunes, Spruce Woods Provincial Park
- Figure 7: Active Dunes, Spirit Dunes, Spruce Woods Provincial Park
List of Tables
- Table 1: List of Specimens of Aweme Borer
- Table 2: Summary of Search Efforts at Aweme Borer Collection Sites
List of Appendices
COSEWIC Status Report
Aweme Borer Papaipema aweme
Perce-tige d'Aweme, Jean-François Landry 2004
Lepidoptera (Moths and Butterflies)
Noctuidae (Owlet or Cutworm Moths)
aweme (Lyman 1908)
There are no named subspecies (Quinter, in Hodges et al. 1983).
Originally described as Gortyna aweme Lyman
Moths of North America (MONA) Catalogue No.:
Lyman, H.H. 1908. Recent work among the borers. Can. Ent., 40(8):249-255.
Holotype female, CAN., MB, Aweme. Deposited in Lyman Entomological Museum, McGill University, Macdonald campus, Montréal.
The genus Papaipema Smith is one of the largest noctuid genera endemic to North America, with at least forty-six described species and five undescribed species known (Goldstein and Quinter 2003). Twenty-six described species occur in Canada (CBIF 2003).Although found throughout most of temperate North America, the genus achieves its greatest diversity in eastern North America (Goldstein and Quinter 2003).
Papaipema aweme appears to have no close relatives (i.e., is not part of a species complex or in a group of sibling species). There is no evidence to suggest it is anything but a “good” species (J.D. Lafontaine, pers. comm.).
The Aweme Borer is a medium-size (33-37 mm wingspan), robust, noctuoid moth (Figure 1). The forewing colour is described in the original description as “gris-incarnate” (greyish flesh-color) (Lyman 1908). The base of the forewings is light brown, with a slightly darker transverse shade near the base and a more pronounced but somewhat diffuse one arcing across the median area. Both the narrow post-median and subterminal lines are darker than the ground colour; the former curves toward the wing base as it nears the costa and the latter is incomplete. The fringes and adjacent terminal areas of the forewings are darker brown. The orbicular spot and claviform spots are similar in size and shape, or the orbicular may be reduced to a small dark ring and the claviform may be almost obsolete. These spots are darker brown than the ground and stand out, as does the larger hourglass-shaped reniform spot. The hind wings are yellow-white, much paler than, and contrasting with, the forewings and are unmarked or marked with a faint median line and discal mark. The body and in particular the head and thorax, are darker brown (Lyman 1908; Hampson 1910). The adult moth is a rather small, very pale, plain light brown species compared to others in the genus (Schweitzer 1999). Based on published photographs, adults of both sexes are superficially alike. (Rockburne and Lafontaine, 1976; CBIF, 2003).
Colour illustrations of the adult are available in Rockburne and Lafontaine 1976 (Fig. 414) and on the web at the Agriculture and Agri-food Canada Moths of Canada website (http://www.cbif.gc.ca/spp_pages/noctuoidea/jpgs/image_e.php?image%5B%5D=109504.jpg%2CPapaipema+aweme).
The early stages (egg, larva and pupa) are unknown. In general Papaipema larvae are dark with dorsal and sub-dorsal white lines; they usually become translucent with the markings becoming very faint or obsolete as they mature (Hessel 1954).
A key to the species of Papaipema, including P. aweme, is available inForbes (1954, p. 191). However, many species of Papaipema are difficult to identify, even with a key, and there are a number of undescribed species not included in the key. The identity of specimens or suspected specimens of Aweme Borer should be confirmed by recognized experts in noctuid moths and in particular in the genus Papaipema. Identification of Papaipema species cannot be guaranteed from a photo of a live specimen, and a voucher specimen should be required for positive identification (Schweitzer 1999).
There are no genetic data available for the species. Although some gene flow could conceivably occur or have occurred between populations along the Great Lakes shoreline, it is unlikely that any gene flow could occur between populations along the Great Lakes and those approximately 1200 km distant in southwestern Manitoba.
None. There are too few data to evaluate.
The range of the Aweme Borer is defined by four collection sites extending along a narrow band from southwestern Manitoba (Aweme area) east to the Great Lakes shoreline in northern Michigan, southern Ontario and northern New York state (Figure 2). All records are historic and the species has not been collected since 1936 (Table 1). The global maximum extent of occurrence (EO) is approximately 160 000 sq. km. The maximum extent of occurrence (EO) in Canada encompasses about 30 000 km2 in a narrow strip approximately 1 500 km long and 20 km wide.
|CAN MB Aweme||1905-08-24||N. Criddle||Lyman Entomological Museum|
|CAN MB Aweme||1905-08-25||N. Criddle||British Museum of Natural History|
|CAN MB Aweme||1905-08-26||N. Criddle||Canadian National Collection of Insects|
|CAN ON Grand Bend||1936-08-15||?||Canadian National Collection of Insects|
|CAN ON Manitoulin I.||2005-08-19||J. K. Morton||Canadian National Collection (?)|
|USA MI Beaver Island||1925-08-13||S. Moore||American Museum of Natural History.|
|USA NY Rochester||1932-08-07||A.G. Richards||U.S. National Museum|
The Canadian range is defined by three collection sites; Aweme in southwestern Manitoba and Grand Bend and Manitoulin Island in southeastern Ontario (Fig. 2.). These three Canadian collection sites account for three-fifths of the global sites, and five of the seven known specimens.
The first three specimens were collected at Aweme, Manitoba in August of 1908, while the most recent collection came from Manitoulin Island, Ontario in 2005. The 2005 specimen is the first report of this species in almost 70 years (Table 1).
The Aweme site is located in the Prairie Ecological Area and the Grand Bend and Manitoulin sites in the Great Lakes Plain (COSEWIC 2003). The maximum extent of occurrence (EO) in Canada encompasses about 35 000 km2 in a narrow strip approximately 1 500 km long and 20 km wide. The maximum area of occupancy (AO) includes a possible 625 km2: approximately 600 km2 in Spruce Woods Provincial Park and Canadian Forces Base (CFB) Shilo combined, about 25 km2 in The Pinery Provincial Park – Grand Bend area, and less than 1 km2 on Manitoulin Island.
Until the 2005 specimen was caught, no one alive today had seen a living Aweme Borer and the precise locations and habitats where the specimens were collected were not known. The locality “Aweme” on the label of specimens collected by Norman Criddle included an area to at least 10 km distance from Aweme, which was the name of the Criddle homestead, and includes much of CFB Shilo and adjacent Spruce Woods Provincial Park (Roughley, 2000). The only historic specimen for which reasonably precise information is available is the one collected at Beaver Island, Michigan, which was apparently collected at the lights of a boat anchored offshore (K. Stead, personal communication, November 2004).
The most likely habitat of the Aweme Borer was thought to be associated with sand dunes. The Aweme Borer was almost certainly associated with Great Lakes dunes and former inland lakeshores, or possibly in swales formed between these dunes (Schweitzer 1999). Four of the five collection sites are located along the shoreline of the Great Lakes; the fifth (Aweme) is located within the Brandon sandhills, which were formed by glacio-lacustrine sediments of glacial Lake Agassiz (David 1977).
Several bits of evidence support the hypothesis that Aweme Borers are resident in dune habitats. Norman Criddle collected all three of his specimens over a 3-day period (Table 1). This suggests they were not taken close to his residence at Aweme, where he collected for over 30 years, but during one of his less frequent collecting forays in the region. The pale colour of the Aweme Borer also suggests it comes from a dry sandy habitat. Beach or other sand dunes are present in the vicinity of all but the most recent collection sites. The presence of an undescribed species of Papaipema on Sable Island, Nova Scotia, not much more than a sandbar in the Atlantic Ocean, indicates that Papaipema species can occupy sandy dune habitat (E. Quinter, pers. comm., August, 2004).
Remnant dune habitats, including those at the two localities in Canada where Aweme Borers have been found historically, are known to have a number of otherwise very rarely collected species of moths, including Acronicta albafufa Grote, Pyla areaeola Balogh and Wilterding, Loxocrambus awemensis McD., a number of species of Schinia and others (Lafontaine 1996; D. Schweitzer, pers. comm., 2004).
The most recent specimen of the Aweme Borer was collected from a bur-oak prairie on Manitoulin Island, with no sand deposits in the vicinity of the collection site. Oak prairies are also present in the vicinity of most of the historic collection sites (D. Lafontaine, pers. comm.), but were not thought to be associated with the Aweme Borer. Given the recent record, it is possible that the Aweme Borer inhabits open oak habitats instead of sand prairies, or that it is restricted to dry, open sites and can live in both sand and oak prairies. It will be possible to determine the exact habitat requirements of the Aweme Borer only if and when the larvae can be found and the host plant(s) identified.
Aweme lies within the Prairie Ecological Area, and the other collection sites all lay within the Great Lakes Plains Ecological Area (COSEWIC 2003). The Aweme area is within the Aspen Parkland Ecoregion (Gauthier et al 2001); the Grand Bend and Manitoulin sites are located within the Mixedwood Plains Ecozone (Lafontaine 1996). Although widely separated by non-prairie habitat today, these two areas were linked in the past, during a post-glacial warming trend that reached its peak about 7000 years ago and resulted in the expansion of the prairies into north-eastern North America. The disjunct remnants of this ‘prairie peninsula’ persist today across the northeastern United States and southern Ontario, the areas where Aweme Borers have been collected. Collections of Lepidoptera from relict prairie in southern Ontario (e.g. Windsor Prairie and The Pinery Provincial Park) indicate that prairie species followed this post-glacial expansion eastward, and many persist there to this day in dune habitats (Lafontaine 1996) and other prairie remnants, including oak savannah prairie.
Manitoba: Native habitat in the Aweme–CFB Shilo–Spruce Woods Provincial Park area hasbeen affected by both natural and anthropogenic changes over the past century. Most native grasslands in the Aweme region have been converted to agricultural use, in particular to irrigated potato production and forage (Fig. 3). Some small areas of native fescue grassland persist in the immediate area of Aweme (Roughley 2000). Native trees, in particular trembling aspen (Populus tremuloides) and bur oak (Quercus macrocarpa), have replaced much of the original grasslands not converted to agricultural use, in particular in Spruce Woods Provincial Park. However, relatively large areas of native grassland and aspen–oak savannah remain in CFB Shilo and Spruce Woods Provincial Park (Figs. 4-5). Almost all remaining active dunes are now located in the Spirit Dunes within Spruce Woods Provincial Park (Figs. 6-7).
Native grasslands habitat converted to forage crop (foreground) and woodland (background). July 29, 2004.
August 26, 2004.
August 26, 2004.
Military activity in CFB Shilo has apparently caused numerous fires on CFB Shilo lands, which have in turn maintained much of that area in grassland. At adjacent Spruce Woods Provincial Park much of the original grassland has been, and continues to be, replaced by aspen-oak woodland (Portman 2004). The active dunes of the Spirit Dunes at Spruce Woods Provincial Park have become progressively more stabilized by vegetation since the 1920s (Fig. 6). Aerial photographs taken in 1928 show active dunes covering an area of approximately 45 ha; this declined steadily to 15-25 ha in the 1960s, but has remained relatively stable since that time (Geological Survey of Canada 2001).
August 26, 2004.
August 4, 2004.
Ontario: The Grand Bend area, including The Pinery Provincial Park, is located on sandy soils and historically had a significant oak-savannah component. Soon after The Pinery Provincial Park was established in 1957, over 3 000 000 pines were planted (Invista 2004). Since that time, prescribed burns and pine cutting programs have largely restored the habitat to oak savannah. All habitats in the park had previously been “seriously degraded to obliterated by grossly out of control deer” (Schweitzer 1999). However, the deer population is now being managed with periodic culls, and savannah vegetation is being managed through prescribed burns. Habitat on adjacent First Nations land is reported to be in more natural condition than habitat within The Pinery Provincial Park, which has been negatively affected by cottage and recreation developments (Ken Stead, pers. comm., November 2004).
The Manitoulin Island site is a large, low-relief limestone island. The site where the collection was made is a small, remnant piece of oak savannah or prairie. Bur-oak prairies were once fairly extensive on Manitoulin Island, but much of this habitat was converted to agriculture or development. Numerous patches of remnant oak prairies still exist on the island, but many are being gradually lost to succession to forest (D. Lafontaine, pers comm.).
Aweme is the name of the original Criddle homestead, consisting of two quarter-sections of land. It is now under provincial jurisdiction as Criddle-Vane Provincial Park. Much of the area to the east falls within CFB Shilo and is under federal government jurisdiction. The bulk of the active dunes and a large block of stabilized sand hills, wetlands, oak-aspen woodland and native grassland is under provincial jurisdiction in Spruce Woods Provincial Park. Lands in both areas are largely protected from conversion to most agricultural uses, and large scale alterations of habitat in designated parks are usually subject to more public scrutiny than are lands in private ownership.
In Ontario, the habitat consists of a mix of private, provincial and First Nations (Ipperwash) land. The Pinery Provincial Park is under provincial jurisdiction. Oak savannah on Manitoulin is largely on private property, although the Nature Conservancy also controls a parcel (J. Jones, pers. comm.). The land where the recent specimen was caught is privately owned (J. Morton, via D. Lafontaine, pers. comm.).
- Life Cycle and Reproduction
- Interspecific Interactions
Essentially nothing is known about the biology of the Aweme Borer, and the following information refers to the genus Papaipema in general.
Adult Aweme Borers are nocturnal and have been collected at lights at night (M. Nielsen, personal communication 2004; D. Schweitzer, personal communication November 2004). The life cycle is undoubtedly like that of all Lepidoptera, consisting of complete metamorphosis, with egg, larva, pupa, and adult stages.
The life cycle takes one full year to complete. Female Papaipema drop eggs loosely in the vicinity of the host plant in the fall and then die. The eggs overwinter and hatch the following spring. Larvae locate and bore into the host plant, where they complete their growth within the roots or stems, usually within a two-month period. Once mature, they pupate either inside or outside the host plant, depending on species or even individuals (Forbes, 1954; Bird, 1934). They remain in the pupal stage for about a month. Adults live for about two weeks, and females appear to be relatively inactive (Bird, 1934).
Collection records for adult Papaipema aweme are from 7-26 August (Table 1), somewhat early for Papaipema species (Schweitzer 1999). Papaipema moths are active late in the night (actually early morning) hours (Schweitzer 1999).
All Papaipema species are endophagous plant borers. They utilize an unusually wide range of plant species as hosts, spread across some 22–25 plant families ranging from ferns to trees to asters and lilies. However, most individual Papaipema species are restricted to only one or a few closely related species or genera of plants (Goldstein 1999, Forbes 1954; Rockburne and Lafontaine 1976). Suggested possible hosts of the Aweme Borer include relatively large native species such as Blazing-star (Liatris sp.) or an endemic thistle (Circium sp.) (J. Troubridge, pers. comm., 2004). The difficulty of identifying the host plant is illustrated by the fact that Dr. Eric Quinter, a borer specialist who has been studying this genus for some time, was unable to identify the host plant of a new species of Papaipema recently discovered on Sable Island, despite spending two weeks on the island searching for it among the very limited plant community present there (J.D. Lafontaine, pers. comm., July 2005).
Adult Papaipema have functional mouthparts and will come to sugar baits (G. Anweiler, personal observation; M. Nielsen, personal communication, November 2004), and likely obtain nectar from one or more species of native plants.
Major natural enemies of Papaipema include mammals such as rodents and skunks (Hessel 1954, Decker 1930, Schweitzer 1999), woodpeckers (Decker 1930), as well as numerous parasitoids and predatory insects. Larvae of Papaipema may be heavily parasitized by both Hymenoptera and Diptera (Fletcher and Gibson 1907; Bird 1934). A tachinid fly, Masicera senilis Will., and a braconid wasp, Apanteles papaipemae Muesebeck, are probably the most important parasitoids of Papaipema larvae (Decker 1930). Small mammals in some cases can completely eradicate small populations of Papaipema (Hessel 1954).
There are no species-specific data.
Members of the genus Papaipema are not known to migrate, and are usually collected in close proximity to the host plants. Dispersal between isolated food patches separated by up to several kilometres does occur (Schweitzer 1999).
There are no data. The Aweme Borer is undoubtedly dependent on one or more unknown species of larval host plant.
Most Papaipema species are restricted to, and dependent upon, one or a few related host plants. Papaipema species have demonstrated the ability to reoccupy patches of host plant following fire, so long as there are populations in unburned refugia in the vicinity (Schweitzer 1999).
Population Sizes and Trends
Extensive collecting of moths has taken place at both historical Canadian sites where Aweme Borers have been found (Table 2). Norman Criddle, who collected the Manitoba specimens, resided and collected in the area for over 30 years (Roughley 2004). Gary Anweiler collected a variety of habitats in the eastern section of Spruce Woods Provincial Park, including the Spirit Dunes and aspen-oak prairie, over a four consecutive night period in late August 2004, using UV traps and mercury vapor light to search specifically for Aweme BorersFootnote 4.
The Grand Bend–The Pinery Provincial Park area has been collected for moths extensively since about 1990, in particular by Ken Stead, a resident of Port Franks, just south of The Pinery Provincial Park (Table 2). Although over 1,500 species of moths have been collected there, no Aweme Borers have ever been found (K. Stead, pers. comm. November 2004). Less intensive moth collecting has also taken place in The Pinery Provincial Park in past years by “many others”, including Gordon Vogg, Robert Curry, and William Lamond (Steve Marshall, review comment).
J. Morton (M. Oldham, pers. comm. based on correspondence between M. Oldham and J. Morton) has collected moths on Manitoulin and nearby islands since the early 1970s and has been trapping extensively for 20 years. He has collected repeatedly at 419 sites on the island, some of them trapped every three weeks throughout the year from spring to late fall. His work yielded approximately 1500 species of Lepidoptera in the Manitoulin area. His database contains over 60 000 records, including information on over 25 000 specimens, making Manitoulin one of the better known areas in Canada with respect to the Lepidoptera that occur there. Despite this extensive collecting effort, including trapping at the right time of year in about six remnant bur-oak prairies, he did not collect P. aweme until in August 19, 2005 he caught a single specimen on his property, which has bur-oak prairie.
In the USA, significant trapping efforts to locate Aweme Borers have been carried out since 1987 at and near the Beaver Island Michigan site, including a search specifically for Aweme Borers in late August 1998 (Table 2). Although over 750 species of moths were collected, no Aweme Borers were found (Profant 1991). Aweme Borers are still being searched for periodically in potential habitat in northern Michigan (M. Nielsen, personal communication 2004).
|Site||Period||Method(s)||Results||Investigator or Source||Note|
|Aweme - Spruce Woods, MB||Resident late 1800s-1930s||Variety, including bait and light||3 specimens of P. aweme||N. Criddle|
|Aweme - Spruce Woods, MB||26/29-08-2004||Ultra-violet & mercury vapor lights||No P. aweme||G. Anweiler||P. aweme targeted|
|Grand Bend – The Pinery P.P. ON||August 1993|
|Ultra-violet light trap||No P. aweme||D. Schweitzer|
|Grand Bend – The Pinery P.P. ON||1996(?) - 1998||Light traps||526 species of noctuids, no P. aweme||Hardwick and Stead 1998|
|Grand Bend – The Pinery P.P. ON||Resident 1990(?)-2004||Various, including light traps||1560 species of moths, no P. aweme||Ken Stead|
1985 - present
|UV trap(s)||1 aweme||J.K. Morton|
|Beaver Island, MI||?||light||1 P. aweme||Moore 1930|
|Beaver Island, MI||1987-1988||Light traps||757 species of moths, no P. aweme||Profant 1991|
|Beaver Island, MI||17-19/08/1998||Ultra-violet light traps||No P. aweme||Penskar et al. 1999||P. aweme targeted|
Papaipema species are notoriously difficult to collect except in close proximity to their host plant(s). Not knowing the host plant of the Aweme Borer greatly hinders efforts to locate it or to determine the size of populations (Schweitzer 1999).
The Aweme borer is known from a total of seven specimens taken at five widely dispersed sites over a period of one hundred years. Three of the specimens were taken at Aweme, Manitoba during a single three-night period in 1905.
According to the summary report for Aweme Borer on NatureServe (NatureServe 2004) the Aweme Borers can reasonably be assumed to be extirpated at four of the five collection localities, including two of the three Canadian sites. However, much apparently intact native habitat remains in the CFB Shilo – Spruce Woods Provincial Park area, and more extensive and intensive search efforts than have taken place so far are needed before concluding the moth no longer exists (G. Anweiler, personal observations, 2004).
There are no data on population fluctuations or trends.
There are no known extant populations of Aweme Borer, other than at the one site on Manitoulin Island. However, should this moth still occur at the Beaver Island, Michigan site or elsewhere along the Great Lakes shoreline, although highly unlikely, it could conceivably re-populate the Grand Bend – The Pinery site if the host plant and suitable habitat are present. The possibility of individuals from Ontario or the United States sites re-colonizing the Manitoba site, or vice versa, are probably nil.
There are no obvious reasons why individuals from any adjacent Great Lakes populations in the United States would not be adapted to survive in southern Ontario.
- Footnote 4
This search was not intense enough to cover all habitats and possible variation in hatch times, but an exhaustive search would require a great deal of effort and was beyond the scope of the contract.
Limiting Factors and Threats
The main limiting factor for Aweme Borers would be the amount and extent of the host plant(s). Nieminen (1996) has pointed out that the pattern of population extinction in moths is affected by host plant characteristics rather than by the characteristics of the moths themselves, and that monophagous moths (feeding on a single species or type of food) are more likely to suffer extirpation than are polyphagous species (feeding on two or more species or types of food), as are species that occur in highly fragmented disjunct populations.
According to Bird (1934), the single most important factor that contributes to the decline of the genus Papaipema is fire. The eggs, which are present from early fall through late spring, are exposed and are particularly vulnerable to fires. Controlled and other burns are known to have a negative impact on Papaipema species, in particular where fires consume all patches of the host plant in an area in a single season. Food plant patches may be unoccupied, or nearly so, by immature stages of Papaipema for the season following a fall, winter or spring burn because most individuals are killed (Schweitzer 1999). Almost all major workers on the genus have commented on the fire sensitivity of Papaipema eggs. Dana (1986) advises always assuming high mortality of Papaipema eggs in fall, winter or spring burn units. To preserve the rarer Papaipema populations, Schweitzer (1999) recommends protecting an adequate amount of the food plant by dividing occupied habitat into smaller burn units. These smaller units can be burned in rotation with 3-5 years between burns of a single unit, and adjacent units should not be burned in consecutive years. No Papaipema site should ever be entirely burned in a single year. The principle of burning blocks and/or rotating burns is applied and addressed in the prescribed burn plans for The Pinery Provincial Park.
As for most species of wildlife, loss of habitat, or some habitat element upon which the species is dependant, is probably the greatest threat. Loss or degradation of native habitats to agricultural, recreational or other uses is perhaps the most widespread and pervasive threat to most species of wildlife, including the Aweme Borer. Cottage and other recreational development has largely replaced native habitat in the Grand Bend – The Pinery Provincial Park region (K. Stead, pers. comm., 2004). Most of the park itself was, or has been, restored to native habitat and is now managed as nature reserve and natural environment zones. Overgrazing by deer and livestock can seriously affect native vegetation and the species dependant upon it. Massive overgrazing by “grossly out of control deer populations” was noted at The Pinery Provincial Park in 1993 (Schweitzer 1999). The deer herd is now being managed and the habitat has recovered measurably and continues to do so. Conversion of grassland habitats to forested habitats, either by natural succession speeded up by suppression of wildfires (i.e. Spruce Woods area) or by planting trees (i.e., historically in The Pinery Provincial Park), are possible threats to species dependant on open habitats. Stabilization of active dunes by vegetation, whether through natural processes or deliberate intervention, can also be a threat to species dependant on active dune habitats. Only patches of remnant bur-oak prairies remain on Manitoulin Island, and only those that have not been burned can be expected to possibly support the Aweme Borer (D. Lafontaine, pers. comm.). Most of the remnants are subject to forest ingrowth as a result of natural succession.
Pesticide applications, especially widespread applications of Lepidoptera-targeting agents, such as Btk spores, could pose a threat in areas where gypsy moths or other pest species are targeted for control.
Special Significance of the Species
The Aweme Borer is one of the most rarely collected moths in North America; it has been collected only once since 1936. It is known from only three widely separated sites in southern Canada and another two in the northeastern USA. Five of the seven specimens known were collected in Canada.
Existing Protection or Other Status Designations
The Aweme Borer is not listed in the US Endangered Species list, the IUCN Red Book or CITES. The Nature Conservancy (NatureServe) has assigned the Aweme Borer a global rank of GH (Globally Historical), a USA national rank of NH (Nationally Historical), a Canadian national rank of NH (Nationally Historical) and Provincial or State ranks of SH (State Historical) in Ontario, Michigan and New York. It is also listed as SNR (Species Not Ranked) in Manitoba. It is not mentioned in the New York State Endangered Species List, but is listed by the state of Michigan as SC (Special Concern).
Any extant populations in Criddle-Vane Homestead Provincial Park and Spruce Woods Provincial Park in Manitoba and The Pinery Provincial Park in Ontario would be protected under legislation protecting wildlife within Provincial Parks. The Manitoulin site is on private property.
Range of Occurrence in Canada: Ontario
Extent and Area Information
Extent of occurrence (EO)(km2)
Area of the site on Manitoulin Island: < 1 km2
(Max. 35 000 km2 – area encompassed by the one extant and two historic collection sites in Canada.)
Specify trend in EO
Not applicable – almost no data
Are there extreme fluctuations in EO?
Not applicable – only one specimen record in the past 70 years
Area of occupancy (AO) (km2)
Known: < 1 km2
(Max. 625 km2 including historic sites)
Specify trend in AO
Are there extreme fluctuations in AO?
Number of known or inferred current locations
One (2 additional historic locations)
Specify trend in #
Stable at 1
Are there extreme fluctuations in number of locations?
Specify trend in area, extent or quality of habitat
Fragmented and declining
Generation time (average age of parents in the population)
Number of mature individuals
Total population trend
Historic declines; recent trend unknown
% decline over the last/next 10 years or 3 generations.
Are there extreme fluctuations in number of mature individuals?
Is the total population severely fragmented?
Probably. Known at a single site; based on known sites, historic population was severely fragmented
Specify trend in number of populations
1 extant plus 2 historic
Are there extreme fluctuations in number of populations?
List populations with number of mature individuals in each:
Manitoulin Island – unknown, probably less than 100
Threats (actual or imminent threats to populations or habitats)
- Natural succession
- Development and other intensive human activity
Rescue Effect (immigration from an outside source)
Status of outside population(s)?
USA: None – possibly extirpated
Is immigration known or possible?
Not known; unlikely
Would immigrants be adapted to survive in Canada?
Is there sufficient habitat for immigrants in Canada?
Unknown but likely
Is rescue from outside populations likely?
No, species possibly extirpated in the US
Manitoba and Ontario: NRH; MI and NY, NRH; MI SC
COSEWIC: Endangered (2006)
Status and Reasons for Designation
Alpha-numeric code: D1
Reasons for Designation: Prior to the collection of one specimen in Ontario in 2005, the moth was last collected 70 years earlier. It is known from only five localities globally, three of which are in Canada. Although the species is poorly known, it is apparently restricted to a rare, fragmented and threatened habitat. Repeated collecting at all of the historic locations has not resulted in relocation of the species, and intensive collecting in the vicinity of the recent record has not yielded any additional specimens.
Applicability of Criteria
Criterion A (Declining Total Population):
Criterion B (Small Distribution, and Decline or Fluctuation):
The known extent of occurrence is much smaller than 5000 km2 (smaller than 1 km2) – B1. The area of occupancy is much smaller than 500 km2 (smaller than 1 km2) – B2. The population was likely severely fragmented during historic times but is no longer fragmented as it is known to exist at 1 location – a. There is no evidence of continuing declines and it is unknown whether the species undergoes extreme fluctuations in the number of mature individuals.
Criterion C (Small Total Population Size and Decline):
Not applicable – although the extant population is likely very small, there is no evidence of decline.
Criterion D (Very Small Population or Restricted Distribution):
Very likely meets Endangered under D1 – number of mature individuals is very likely fewer than 250. Also meets Threatened under D2 – the population has a very restricted known area of occupancy (smaller than 1 km2) and number of locations (1), such that the moth is prone to the effects of human activities and stochastic events.
Criterion E (Quantitative Analysis):
In addition to all the individuals listed in the “Authorities Consulted” section, Gary G. Anweiler would like to thank the following people and agencies for providing information, permits, and other assistance: Chris Schmidt, University of Alberta; Rob Roughley, University of Manitoba;Theresa Fowler, COSEWIC; Jean‑François Landry, J.D. Lafontaine and J. Troubridge, all Agriculture and Agri-Food Canada; and in particular the staff at Spruce Woods Provincial Park in Manitoba and Good Spirit Lake Provincial Park in Saskatchewan for providing vehicle access to areas of the park not open to the general public. And last but not least, Gary G. Anweiler thanks his wife Judy Weisgarber for her ongoing patience and support. Funding provided by the Canadian Wildlife Service, Environment Canada.
Dr. Eric L. Quinter, Div. of Invertebrate Zoology, American Museum of Natural History.
Dr. David Duncan, Head, Wildlife Section, Envy. Cons. Branch, CWS, Prairie and Northern Region, Edmonton AB.
Rick Pratt, CWS, Ontario Region, Nepean ON.
Dr. Gordon Court, Prov. Wild. Status Biol., Alberta Fish & Wildlife, Edmonton AB.
Dr. James Duncan, Manager, Biodiversity Conservation Section, Wildlife and Ecosystem Protection Branch, Manitoba Conservation, Winnipeg MB.
Alan Dextrase, Aquatic SAR Biologist, Species at Risk Section, Ontario Parks, Ontario Ministry Nat. Resources, Peterborough ON.
Jeanette Pepper, Zoologist, Saskatchewan CDC, Saskatchewan Environment, Regina SK.
Wayne Nordstrom, Alberta Natural Heritage Information Centre, Alberta Environment, Edmonton AB.
Nicolle Firlotte, Manitoba CDC, Winnipeg MB.
Dr. Martin Honey, Curator of Lepidoptera, Natural History Museum, London, England.
Dale Schweitzer, NatureServe and the Nature Conservancy, Post Norris, NJ.
Ken Stead, lepidopterist, Brantford, ON.
Mogens Nielsen, lepidopterist, E. Lansing, MI.
Dr. J. Donald Lafontaine – scientist and noctuid specialist, Canadian National Collection of Insects and Arthropods, Ottawa, Ontario.
Jim Troubridge – lepidopterist and noctuid specialist Canadian National Collection of Insects, Arachnids and Nematodes, Ottawa, Ontario.
Bird, Henry. 1934. Decline of the noctuid genus Papaipema (Lepidoptera). Annals of the Entomological Society of America, 27(4):551-556.
CBIF (Canadian Biophysical Information Facility). 2003. Moths of Canada website.
COSEWIC. 2003. Operations and Procedures Manual. Committee on the Status of Endangered Wildlife in Canada. November, 2003.
Dana, R. 1986. The Dakota skipper: A now rare prairie butterfly. Nat. Areas J. 3:31-34.
David, P.P. 1977. Sand Dune Occurrences of Canada: a theme and resource inventory study of eolian landforms of Canada. Indian and Northern Affairs, National Parks Branch. Ottawa. 183 pp.
Decker, G.C. 1930. Corn boring insects of Iowa with special reference to the stalk borer, Papaipema nebris (Gn.) and the four-lined borer, Luperina stipata (Morr.). PhD. Dissertation. Iowa State University, Ames Iowa. 174 pp.
Fletcher, J. and A. Gibson. 1907. Entomological record, 1906. The Annual Report of the entomological Society of Ontario, 37: 86-104.
Forbes, W.T.M. 1954. Lepidoptera ofNew Yorkand Neighboring States, Noctuidae, Part III. Memoir 329. Cornell Univ. Agricultural Research Station. Ithaca, NY.
Gauthier, D.A., K. McGovern and L. Patino. 2001. Grassland Habitat and Conservation Areas, Prairie Ecozone of Canada. Canadian Plains Research Center, University of Regina, Saskatchewan (www.cprc.uregina.ca). 30 pp.
Geological Survey of Canada. 2001. Sand Dune and Climate Change Studies in the Prairie Provinces. Natural Resources Canada, Ottawa.
Goldstein, P.Z. 1999. Molecular systematics and the macroevolution of host plant use in the endophagous moth genus Papaipema Smith 1899. Ph.D. Dissertation, U. of Connecticut.
Goldstein, P.Z. and E.L. Quinter. 2003. Host plant associations of western species of Papaipema (Noctuidae) with particular reference to the Apiaceous plants. J. Lep. Soc. 57(2):153-156.
Hampson, G.F. 1910. Catalogue of the Lepidoptera Phalaenae in the British Museum9:81.
Hardwick, D.F. and K. Stead. 1998. The life history of Schinia sanguinea (Geyer) (Noctuidae; Heliothentinae) with a report on a survey for Heterocera in southwestern Ontario. J. Lep. Soc., 52(4):381-355.
Hessel, S.A.1954. A guide to collecting the plant-boring larvae of the genus Papaipema Noctuidae). Lepidoptera News 8:57-63.
Hodges, R.W. et al., eds. 1983.Check List of the Lepidoptera of North America north of Mexico. E.W. Classey and the Wedge Entomological Research Foundation, London, 284 pp.
Innvista. 2004. Pinery Provincial Park. httpp://www.innvista.com/science/ecology/parks /pinery.htm. Accessed November 7, 2004.
Jones, J.A., 2000. Fire history of the bur oak savannas of Sheguiandah Township, Manitoulin Island. Michigan Botanist 39(1), pp 3-15.
Jones, Judith. pers. comm., 2006 Biologist and Consultant, Manitoulin Island.
Lafontaine, J.D. 1996 in Smith, I.M. Assessment of species diversity in the Mixedwood Plains Ecozone. Biodiversity Assessment and Evaluation Research Branch, Agriculture Canada Eastern Cereal and Oilseed Research Center, Ottawa.(http://www.naturewatch.ca/MixedWood/) (accessed November, 2004).
Lafontaine, J.D. pers. comm., 2005 and 2006. Phone call July 2005 and April 2006. Scientist and noctuid specialist, Canadian National Collection of Insects and Arthropods, Ottawa, Ontario.
Landry, J.-F. pers. comm., 2004. E-mail correspondence to G. Anweiler, August, 2004. Lepidoptera specialist, Canadian National Collection of Insects, Ottawa.
Lyman, H.H. 1908. Recent work among the borers. Can. Ent. 40(8): 249-255.
Marshall, S.A. Review comment, 2005. Entomologist, University of Guelph, Guelph, Ontario
Michigan State University Extension, 2004. Michigan Natural Features Inventory. (http://web4.msue.msu.edu/mnfi/data/specialanimals.cfm) (accessed November, 2004).
Moore, S. 1930. Lepidoptera of the Beaver Islands. Occ. Pap. Mus. Zool. Univ. Mich., 214:1-28.
NatureServe 2004. NatureServe Explorer: An online encyclopedia of life [web application]. Version 4.0. NatureServe, Arlington Virginia. (Accessed October 27, 2004).
Nielsen, M. pers. comm., August 2004. Email correspondence to G. Anweiler. August 2004. Lepidopterist, E. Lansing, Michigan.
Nieminen, M. 1996. Risk of population extinction in moths: effect of host plant characteristics. Oikos 76:475-484
Oldham, M. pers comm., April 2006. Email correspondence between M. Oldham (Botanist/Herpetologist, Ontario Natural Heritage Information Centre, Ontario Ministry of Natural Resources, Peterborough, Ontario) and J. Morton (Botanist/Lepidopterist, Manitoulin Island, Ontario). April 2006.
Penskar, M.R., P.J. Higman, D.A. Hyde, D.L. Cuthrell, R.A. Corner, M.A. Kost, and E.J. Judziewicz. 1999. Biological Inventory for Conservation of Great Lakes Islands: 1998 Progress report. Report # 1999-01 Michigan Natural Features Inventory. Prepared for Michigan Coastal Management Program, Land and Water Management Division, MDEQ.
Portman, T. 2004. Squeezing out the skink. Winnipeg Free Press, page B3 August 29.
Profant, D. 1991. An annotated checklist of the Lepidoptera of the Beaver Islands archipelago, Lake Michigan. Great Lakes Entomologist. 24(2):85-97.
Quinter, E.L. 1983. Papaipema, pp. 138-139 (in part). In Hodges, R.W. et al., eds. 1983. Check List of the Lepidoptera of North America north of Mexico. E.W. Classey and the Wedge Entomological Research Foundation, London, 284 pp.
Quinter, Dr. E.L. pers. comm., 2004. Email correspondence to G. Anweiler. August 2004. Papaipema specialist, Div. of Invertebrate Zoology, American Museum of Natural History, NY.
Rockburne, E.W. and J.D. Lafontaine. 1976. The Cutworm Moths of Ontario and Quebec. Research Branch, Canada Dept. Agriculture Pub. 1593. 164 pp.
Roughley, R.E. 2000. Aweme, Manitoba – An important historical grassland site. Arthropods of Canadian Grasslands, Newsletter #6 pp.8-14. Biological Survey of Canada.
Schweitzer, D.F. 1989. A review of Category 2 Insecta in USFWS regions 3, 4, 5. Prepared for the United States Wildlife Service in NatureServe 2004. NatureServe Explorer: An online encyclopedia of life [web application]. Version 4.0. NatureServe, Arlington Virginia. (Accessed October 27, 2004).
Schweitzer, D.F. 1999. Papaipema aweme in NatureServe Explorer: An online encyclopedia of life [web application]. Version 4.0. NatureServe, Arlington Virginia. (Accessed October 27, 2004).
Schweitzer, D.F. 2004. August 2004. Email correspondence to G. Anweiler. August 2004. Biologist, Nature Conservancy.
Smith, I.M. no date. Assessment of Species Diversity in the Mixedwood Plains Ecozone. Biodiversity Assessment and Evaluation Research Branch, Ag. Canada Eastern Cereal and Oilseed Research Centre, Ottawa. (http://www.naturewatch.ca/MixedWood/) (accessed November, 2004).
Stead, K. pers. comm., 2004. Phone call and e-mail, 2004. Resident lepidopterist, The Pinery Provincial.Park, Ontario.
Gary Anweiler is a research associate at the University of Alberta Strickland Entomological Museum, a recognized authority on the noctuoid moths of Alberta and a sitting member of the COSEWIC Arthropods subcommittee.
United States National Museum, Washington, D.C.
Canadian National Collection of Insects, Arachnids and Nematodes, Ottawa, ON
Natural History Museum, London, UK
Note: Because this is such a rare species (7 known specimens), is difficult to identify by non-specialists and has been the subject of searches by researchers currently working on the genus, an extensive search of smaller institutional collections was deemed unnecessary.
Appendix 1: Required Contacts for Information on Species
Name of report contractor: Gary G. Anweiler
|Name of jurisdiction||Name of contact(s) and date(s)|
|Canadian Wildlife Service||Dave Duncan Oct. 28, 2004|
Rick Pratt Nov. 24, 2004
|Department of Fisheries and Oceans (aquatic species only)||Not applicable|
|Parks Canada||Not applicable|
|Provincial / territorial representative(s) corresponding to the range of the species||James Duncan, Nov. 24, 2004 (Manitoba)|
Alan Dextrase, Nov. 24, 2004 (Ontario)
|Conservation Data Centre(s) or Natural Heritage Information Centre(s) corresponding to the range of the species||MB CDC (Nicole Firlotte) June 8, 2004|
ON NHIC (Don Sutherland) Nov. 24, 2004
|Wildlife Management Board(s) corresponding to the range of the species (species in British Columbia, Yukon, Northwest Territories, Nunavut or northern Quebec)||Not applicable|
|COSEWIC Secretariat for information on sources of Aboriginal Traditional Knowledge||Gloria Goulet, June 8, 2004|
|Recovery team (if one exists)||Not applicable|
- Date Modified: