Greater sage-grouse (Centrocercus urophasianus) COSEWIC assessment and status report: chapter 11

Technical Summary: Greater Sage-Grouse phaios subspecies

Centrocercus urophasianus phaios

Greater Sage-Grouse phaios subspecies – Tétras des armoises de la sous-espèce phaios

Range of Occurrence in Canada:

formerly British Columbia

Extent and Area Information

Extent of occurrence (EO) (km²) :

0 km²

Specify trend in EO

Are there extreme fluctuations in EO?

0

Area of occupancy (AO) (km²) :

0 km²

Specify trend in AO :

Not applicable in Canada; declining in USA

Are there extreme fluctuations in AO?

No

Number of known or inferred current locations

0

Specify trend in #

Are there extreme fluctuations in number of locations?

Specify trend in area, extent or quality of habitat

Population Information

Generation time (average age of parents in the population) :

Ca. 3 years

Number of mature individuals :

0

Total population trend:

% 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?

Specify trend in number of populations

Are there extreme fluctuations in number of populations?

List populations with number of mature individuals in each:

Threats (actual or imminent threats to populations or habitats)

Habitat loss and fragmentation.

Rescue Effect (immigration from an outside source)

Status of outside population(s)?

USA: [Washington] population small and declining

Is immigration known or possible?

No

Would immigrants be adapted to survive in Canada?

Yes

Is there sufficient habitat for immigrants in Canada?

Probably not

Is rescue from outside populations likely?

No

Quantitative Analysis

-

Current Status

COSEWIC: Extirpated (2000 and 2008)

Status and Reasons for Designation

Status: Extirpated

Alpha-numeric code: Not applicable

Reasons for Designation: This subspecies has not been seen in its former range in the Okanagan Valley of British Columbia for about a century.

Applicability of Criteria

  • Criterion A (Declining Total Population): Not applicable.
  • Criterion B (Small Distribution, and Decline or Fluctuation): Not applicable.
  • Criterion C (Small Total Population Size and Decline): Not applicable.
  • Criterion D (Very Small Population or Restricted Distribution): Not applicable.
  • Criterion E (Quantitative Analysis): Not applicable.

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