BirdAnalyst
Species · BCR 10 · BBS 2025 Release · 1966–2024

Western Screech-Owl In Northern Rockies

All regionsNorthern RockiesGeneralists

Western Screech-Owl in Northern Rockies has collapsed: down 77% on the route-weighted index since 1990.

-77%Since 1990TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
11Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Western Screech-Owl in Northern Rockies. See the full index history below.

Routes In Northern Rockies

Routes recording Western Screech-Owl in Northern Rockies.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
CentervilleIDAHO31972
LaurierWASHINGTON22010
Hunter PeakWYOMING21995
CoolinIDAHO11999
Salmon RiverIDAHO11991
FeathervilleIDAHO11990
LaurelMONTANA12004
SkalkahoMONTANA11996
Silver CreekOREGON11984
Summit PrOREGON12014
CurlewWASHINGTON12017

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.