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COSEWIC Status Reports

  • COSEWIC Assessment and Status Report on the Bull Trout Salvelinus confluentus in Canada (2013)
    Bull Trout is a large char. This salmonid derives its name from its large head and jaws. Bull Trout are olive-green to blue-grey in colour and pale round spots on their flanks and back distinguish them from most other similar-looking salmonids. It is difficult to visually distinguish them from Dolly Varden char, however, and detailed measurements or genetic analyses are required for accurate identification where their ranges overlap. Because of i ...
  • COSEWIC Assessment and Status Report on the Salish Sucker Catostomus sp. cf. catostomus in Canada (2013)
    The Salish Sucker comprises a genetically and morphologically distinct group of populations within the Longnose Sucker (Catostomus catostomus) complex. It is small-bodied (to 287 mm in Canada), dark green mottled with black above, and dirty white below. Males display a broad red, lateral stripe during the spawning season. Scales are small, as is the mouth, which is located on the lower surface of the head. The Sali
  • COSEWIC assessment and update status report on the Salish Sucker Catostomus sp in Canada (2013)
    The Salish Sucker comprises a genetically and morphologically distinct group of populations within the Longnose Sucker (Catostomus catostomus) complex. It is small-bodied (to 287 mm in Canada), dark green mottled with black above, and dirty white below. Males display a broad red, lateral stripe during the spawning season. Scales are small, as is the mouth, which is located on the lower surface of the head. The Sali
  • COSEWIC Assessment and Status Report on the Salish Sucker Catostomus sp. cf. catostomus in Canada (2013)
    The Salish Sucker comprises a genetically and morphologically distinct group of populations within the Longnose Sucker (Catostomus catostomus) complex. It is small-bodied (to 287 mm in Canada), dark green mottled with black above, and dirty white below. Males display a broad red, lateral stripe during the spawning season. Scales are small, as is the mouth, which is located on the lower surface of the head. The Sa
  • COSEWIC Assessment and Status Report on the Western Tiger Salamander Ambystoma mavortium in Canada (2013)
    Western Tiger Salamanders are among the largest salamanders in North America and are top predators in the largely fishless ponds and lakes where they occur. Terrestrial adults have a blotched, barred or reticulate pattern of yellow or off-white on a dark background. Genetic and morphological evidence indicates that the Western Tiger Salamander, consisting of several subspecies, is a separate species from the Eastern Tiger Salamander, Ambystoma ti ...
  • COSEWIC assessment and status on report on the crooked-stem aster Symphyotrichum prenanthoides in Canada (2013)
    Crooked-stem Aster (Symphyotrichum prenanthoides) is a perennial wildflower up to 90 cm tall with pale blue flower heads and zigzagging stems. The leaves become narrowed in the lower third but expand at the base to clasp the stem. The species grows in colonies, with multiple stems arising from creeping rhizomes (horizontal underground stems). Each flower head consists of a yellow disc, surrounded by 17 to 30, pale blue rays. Canadian populations ...
  • COSEWIC assessment and status report on the Crooked-stem Aster Symphyotrichum prenanthoides in Canada (2013)
    Crooked-stem Aster (Symphyotrichum prenanthoides) is a perennial wildflower up to 90 cm tall with pale blue flower heads and zigzagging stems. The leaves become narrowed in the lower third but expand at the base to clasp the stem. The species grows in colonies, with multiple stems arising from creeping rhizomes (horizontal underground stems). Each flower head consists of a yellow disc, surrounded by 17 to 30, pale blue rays. Canadian populations ...
  • COSEWIC assessment and status report on the Massasauga Sistrurus catenatus in Canada (2013)
    The Massasauga (Sistrurus catenatus) is a relatively small, thick-bodied rattlesnake with a segmented rattle on its tail tip. It is grey, tan or light brown with dark brown, bow-tie shaped blotches on its back and is often confused with other banded or blotched Ontario snakes. The Massasauga has elliptical pupils and a pair of heat-sensitive pits between the eyes and nostrils. The Massasauga is Ontario’s only remaining venomous snake and provides
  • COSEWIC assessment and update status report on the massasauga Sistrurus catenatus in Canada (2013)
    The Massasauga (Sistrurus catenatus) is a relatively small, thick-bodied rattlesnake with a segmented rattle on its tail tip. It is grey, tan or light brown with dark brown, bow-tie shaped blotches on its back and is often confused with other banded or blotched Ontario snakes. The Massasauga has elliptical pupils and a pair of heat-sensitive pits between the eyes and nostrils. The Massasauga is Ontario’s only remaining venomous snake and provides
  • COSEWIC Assessment and Status Report on the Riverine Clubtail Stylurus amnicola in Canada (2013)
    Riverine Clubtail (Stylurus amnicola) is a dragonfly in the clubtail family. Members of the genus Stylurus are referred to as “hanging clubtails” for their habit of hanging vertically when perched on streamside vegetation. It is a small (47-49 mm long), slender dragonfly, with a prominent club at the end of the abdomen. The front of the thorax has a distinctive three-pointed star that distinguishes this sp
  • COSEWIC Assessment and Status Report on the Atlantic Wolffish Anarhichas lupus in Canada (2013)
    The Atlantic Wolffish, Anarhichas lupus, is a large-bodied, bottom-dwelling fish with prominent canine-like teeth. It has dark bars on its body that distinguish it from the other wolffish species. This species is taken as bycatch in a wide range of fisheries and was of commercial interest in the 1990s. A very limited commercial fishery persists, with the largest catches reported off Nova Scotia and south of Newfoundland.
  • COSEWIC assessment and status report on the American Eel Anguilla rostrata in Canada (2013)
    The American Eel is an elongate, cylindrical fish, a member of the “freshwater eels”, and the only North American representative of the genus. The American Eel has a protruding lower jaw and a small gill opening in front of the pectoral fins, which are located high up on the side of body. The dorsal fin is long, beginning at about mid-body and extending such that it is confluent with the caudal and anal fin. The American Eel lacks pelvic fins and ...
  • COSEWIC assessment and status report on the Baird's Sparrow Ammodramus bairdii in Canada (2013)
    The Baird’s Sparrow is a secretive grassland sparrow, distinguished from other sparrows by “moustache” marks on its yellowish-ochre face, a necklace of thin streaks across its breast, and a song that usually ends in a wiry, musical trill. As a range-restricted species of the northern prairies, it is a valuable grassland indicator for that region.
  • COSEWIC assessment and status report on the Behr’s Hairstreak Satyrium behrii in Canada (2013)
    Behr’s Hairstreak (Satyrium behrii) is a small butterfly (wingspan 2.5 – 2.9 cm) in the family Lycaenidae. The dorsal forewing and hindwing surfaces have wide black margins that surround a rich, yellowish-orange-brown patch. There is one subspecies of Behr’s Hairstreak in Canada.
  • COSEWIC assessment and status report on the Blackstripe Topminnow Fundulus notatus in Canada (2013)
    The Blackstripe Topminnow, Fundulus notatus, is a small (74 millimetres maximum length) freshwater fish characterized by an upturned mouth, flat head and a black horizontal stripe extending from the snout to the caudal fin base. The species has a somewhat unusual diet composed in large part of terrestrial insects and is part of one of the most biologically diverse aquatic communities in Canada.

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