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

Woodhouse's Scrub-Jay In Northern Rockies

All regionsNorthern RockiesGeneralists

Woodhouse's Scrub-Jay in Northern Rockies has surged: up 247% on the route-weighted index since 1993.

+247%Since 1993TrendPercent 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 →
5Routes 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 →
15YearsYears 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Woodhouse's Scrub-Jay has surged in Northern Rockies: up 247% on the route-weighted index since 1993.

Routes In Northern Rockies

Routes recording Woodhouse's Scrub-Jay 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 →
Browns ParkCOLORADO632006
Rock SpringsWYOMING52022
LayCOLORADO42023
MaybellCOLORADO22024
Rock Springs 2WYOMING12023

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