Pygmy short-horned lizard COSEWIC assessment and status report: chapter 11
Technical Summary
Phrynosoma douglasii
Pygmy Short-horned Lizard – Iguane pygmée à cornes courtes
Range of Occurrence in Canada:
south Okanagan and Similkameen valleys
Extent and Area Information
Extent of occurrence (EO) (km²)
Unable to calculate as there are no confirmed data points: Unknown or 0 km²
Specify trend in EO:
None
Are there extreme fluctuations in EO?
Unlikely
Area of occupancy (AO) (km²)
Unable to calculate as there are no confirmed data points: Unknown or 0km²
Specify trend in AO:
None
Are there extreme fluctuations in AO?
Unknown
Number of known or inferred current locations:
None confirmed
Specify trend in # :
unknown
Are there extreme fluctuations in number of locations?
No
Specify trend in area, extent or quality of habitat:
Habitat rapidly being converted or degraded by invasive plants and by human activities.
Population Information
Generation time (average age of parents in the population):
5 years
Number of mature individuals:
Unknown, likely zero
Total population trend:
None
% decline over the last/next 10 years or 3 generations.
Unknown
Are there extreme fluctuations in number of mature individuals?
No
Is the total population severely fragmented?
Probably if it exists
Specify trend in number of populations:
Unknown, probably none
Are there extreme fluctuations in number of populations?
No
List populations with number of mature individuals in each:
unknown; probably none
Threats (actual or imminent threats to populations or habitats)
- Loss of habitat;
- Lack of rescue effect
Rescue Effect (immigration from an outside source)
USA:
N5
Washington State:
Vulnerable (S3)
Is immigration known or possible?
Possible but unlikely
Would immigrants be adapted to survive in Canada?
Probably
Is there sufficient habitat for immigrants in Canada?
Yes
Is rescue from outside populations likely?
Unlikely
Quantitative Analysis
May already be extirpated
Current Status
COSEWIC:
Extirpated (1992, 2000, 2007)
Status and Reasons for Designation
Status:
Extirpated
Alpha-numeric code:
Not applicable
Reasons for Designation
There have been no confirmed sightings in the past 100 years, although there have been anecdotal reports during that time.
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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