BirdAnalyst
Species · BCR 10 · BBS 2026 Release · 1966–2025

Olive-sided Flycatcher In Northern Rockies

All regionsNorthern RockiesAerial insectivores

Olive-sided Flycatcher in Northern Rockies has held roughly steady: up 1% on the route-weighted index since 1970.

+1%Since 1970TrendPercent 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 →
130Routes 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 →
57YearsYears 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 Olive-sided Flycatcher in Northern Rockies. See the full index history below.

Olive-sided Flycatcher In Northern Rockies Population Forecast

If the recent trend holds, Olive-sided Flycatcher in Northern Rockies is projected to stay roughly flat through 2030, near 1.1 (95% range 0.52–1.7). A 5-year backtest shows a typical error of ±44.7%, with 100% of held-out values landing inside the 95% band.

+9%Change by 2030TrendPercent 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 →
1.1Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.52–1.795% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±44.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Olive-sided Flycatcher in Northern Rockies is projected to stay roughly flat through 2030, near 1.1 (95% range 0.52–1.7). A 5-year backtest shows a typical error of ±44.7%, with 100% of held-out values landing inside the 95% band.19682030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
20261.10.501.6
20271.10.511.7
20281.10.511.7
20291.10.521.7
20301.10.521.7

Routes In Northern Rockies

Routes recording Olive-sided Flycatcher 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 →
Cape HornIDAHO162025
Deer ParkWASHINGTON142006
Lolo PassIDAHO132019
SulaMONTANA82024
Howard Mdws.OREGON82025
TroyOREGON82025
Black Mtn.OREGON82004
Yellow PineIDAHO72016
SkalkahoMONTANA71998
Hebgen LakeMONTANA72025
Hunter PeakWYOMING72025
GoldenIDAHO52016
PierceIDAHO52007
Rochat DivdeIDAHO52025
Whitefish LakeMONTANA52024
Eagle CreekOREGON52025
DesolationOREGON52007
Colter BayWYOMING51999
Sawtooth CtyIDAHO42014
Marble CreekIDAHO42025
BurgdorfIDAHO42025
SunbeamIDAHO42025
Sawtooth City 2IDAHO42025
Libby DamMONTANA42015
Logan PassMONTANA42025

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.