BirdAnalyst
Species · BCR 16 · BBS 2025 Release · 1966–2024

Least Flycatcher In Southern Rockies / Colorado Plateau

All regionsSouthern Rockies / Colorado PlateauAerial insectivores

Least Flycatcher in Southern Rockies / Colorado Plateau has fallen sharply: down 69% on the route-weighted index since 1994.

-69%Since 1994TrendPercent 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 →
17YearsYears 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 Least Flycatcher in Southern Rockies / Colorado Plateau. See the full index history below.

Routes In Southern Rockies / Colorado Plateau

Routes recording Least Flycatcher in Southern Rockies / Colorado Plateau.
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 →
Fletcher PkWYOMING22007
CastletonCOLORADO12011
AlamosaCOLORADO12010
BrookhurstWYOMING12012
Fox ParkWYOMING12014

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