Western screech-owl (Otus kennicottii) COSEWIC assessment and status report: chapter 12

Range of occurrence in Canada (by province / territory / ocean)

British Columbia

extent of occurrence (km²)

approximately 200,000 km²

specify trend (decline, stable, increasing, unknown)

probably stable

are there extreme fluctuations in extent of occurrence (> 1 order of magnitude)?

no

area of occupancy (km²)

approximately 50,000 km²

specify trend (decline, stable, increasing, unknown)

decline

are there extreme fluctuations in area of occupancy (> 1 order magnitude)?

No

number of extant locations

Not applicable (n.a.)

specify trend in # locations (decline, stable, increasing, unknown)

n.a.

are there extreme fluctuations in # locations (>1 order of magnitude)?

n.a.

habitat trend:  specify declining, stable, increasing or unknown trend in area, extent or quality of habitat

declining

generation time (average age of parents in the population) (indicate years, months, days, etc.)

2-3 yrs

number of mature individuals (capable of reproduction) in the Canadian population (or, specify a range of plausible values)

3,000-10,000

total population trend:  specify declining, stable, increasing or unknown trend in number of mature individuals

slow decline

if decline, % decline over the last/next 10 years or 3 generations, whichever is greater (or specify if for shorter time period)

unknown

are there extreme fluctuations in number of mature individuals (> 1 order of magnitude)?

No

is the total population severely fragmented (most individuals found within small and relatively isolated (geographically or otherwise) populations between which there is little exchange, i.e., < 1 successful migrant / year)?

No

list each population and the number of mature individuals in each

-

specify trend in number of populations (decline, stable, increasing, unknown)

-

are there extreme fluctuations in number of populations (>1 order of magnitude)?

-

does species exist elsewhere (in Canada or outside)?

Yes

status of the outside population(s)?

declining

is immigration known or possible?

Yes, but limited due to non-migratory nature of species

would immigrants be adapted to survive here?

limited perhaps by presence of Barred Owls

is there sufficient habitat for immigrants here?

limited by habitat loss