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

Common Yellowthroat In Northern Rockies

All regionsNorthern RockiesForest birds

Common Yellowthroat in Northern Rockies has edged down: down 22% on the route-weighted index since 1970.

-22%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 →
153Routes 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 Common Yellowthroat in Northern Rockies. See the full index history below.

Common Yellowthroat In Northern Rockies Population Forecast

If the recent trend holds, Common Yellowthroat in Northern Rockies is projected to fall about 40% by 2030 — from 1.9 in 2025 to a central estimate of 1.1 (95% range 0.16–2.1). A 5-year backtest shows a typical error of ±46.4%, with 80% of held-out values landing inside the 95% band.

-40%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 →
0.16–2.195% 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 →
±46.4%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, Common Yellowthroat in Northern Rockies is projected to fall about 40% by 2030 — from 1.9 in 2025 to a central estimate of 1.1 (95% range 0.16–2.1). A 5-year backtest shows a typical error of ±46.4%, with 80% 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 →
20261.20.232.1
20271.20.212.1
20281.20.192.1
20291.10.182.1
20301.10.162.1

Routes In Northern Rockies

Routes recording Common Yellowthroat 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 →
NaplesIDAHO282025
ChestnutMONTANA192025
Pablo Res.MONTANA172025
Clyde ParkMONTANA132025
SulaMONTANA122024
East Glacier ParkMONTANA122025
KalispellMONTANA102025
AugustaMONTANA102025
RaynesfordMONTANA102025
CoolinIDAHO92025
SpartaOREGON92025
Twin BridgesMONTANA81976
Wise RiverMONTANA82025
MammothWYOMING82025
ClarkWYOMING72025
Seedskadee 2WYOMING72024
NinemileMONTANA62025
Muddy CreekMONTANA62015
Browns ParkCOLORADO52025
Libby DamMONTANA52025
Red RockMONTANA52025
NoxonMONTANA52022
PhilipsburgMONTANA52025
Freeman CreekMONTANA52016
Fort LoganMONTANA52025

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