Peregrine falcon (pealei and anatum/tundrius) COSEWIC assessment and status report: chapter 12

Technical Summary: Falco peregrinus pealei

Falco peregrinus pealei

Peregrine Falcon pealei subspecies – Faucon pèlerin de la sous-espèce pealei

Range of Occurrence in Canada:

British Columbia

Extent and Area Information

Extent of occurrence (EO) (km²)
47,000 km². Based on portion of British Columbia occupied by Peale’s
Specify trend in EO
Stable
Are there extreme fluctuations in EO?
No
Area of occupancy (AO) (km²)
Minimum 8,500 km². Minimum - based on home range of 78 km² multiplied by the number of occupied nest sites in 2005 national survey (108)
Specify trend in AO
Stable
Are there extreme fluctuations in AO?
No
Number of known or inferred current locations
N/A
Specify trend in #
N/A
Are there extreme fluctuations in number of locations?
N/A
Specify trend in area, extent or quality of habitat
Stable

Population Information

Generation time (average age of parents in the population)
4-6 years
Number of mature individuals
Minimum 176. Minimum - based on number of occupied nest sites counted in the 2005 national survey
Total population trend:
Increasing
% decline over the last/next 10 years or 3 generations.
0
Are there extreme fluctuations in number of mature individuals?
No
Is the total population severely fragmented?
No
Specify trend in number of populations
N/A
Are there extreme fluctuations in number of populations?
N/A
List populations with number of mature individuals in each:

Threats (actual or imminent threats to populations or habitats)

Declines in seabird prey associated with changing ocean conditions and alien predators at seabird colonies

Rescue Effect (immigration from an outside source)

Status of outside population(s)?
USA: Stable population in Alaska available to provide breeders for British Columbia
Is immigration known or possible?
Yes
Would immigrants be adapted to survive in Canada?
Yes
Is there sufficient habitat for immigrants in Canada?
Yes
Is rescue from outside populations likely?
Yes

Quantitative Analysis

None available

Current Status

COSEWIC: Special Concern (2001, 2007)

Status and Reason for Designation

Status: Special Concern

Alpha-numeric code: Met criteria for Endangered, D1, but designated Special Concern because of increasing population size, potential for rescue, and because a significant portion of the population breeds in protected areas.

Reason for Designation: This subspecies occurs in small numbers along most of the coastal area of British Columbia, where it breeds mostly in protected areas. Its population has shown ongoing increases in size over the last 35 years. Immigration from the United States, where numbers are stable, is likely.

Applicability of Criteria

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