BirdAnalyst
Species · Idaho · BBS 2026 Release · 1966–2025

Common Yellowthroat Population Trend in Idaho

All statesForest birds

Common Yellowthroat in Idaho has surged: up 223% on the route-weighted index since 1972.

+223%Since 1972TrendPercent 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 →
40Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
55YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Yellowthroat Trends in IdahoNotable 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 →

Common Yellowthroat has surged in Idaho: up 223% on the route-weighted index since 1972.

Common Yellowthroat Population Forecast in Idaho

If the recent trend holds, Common Yellowthroat in Idaho is projected to fall about 32% by 2030 — from 1.3 in 2025 to a central estimate of 0.89 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±60.3%, with 100% of held-out values landing inside the 95% band.

-32%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 →
0.89Projected 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 →
0.00–2.295% 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 →
±60.3%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 Idaho is projected to fall about 32% by 2030 — from 1.3 in 2025 to a central estimate of 0.89 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±60.3%, with 100% of held-out values landing inside the 95% band.19702030
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 →
20260.890.002.2
20270.890.002.2
20280.890.002.2
20290.890.002.2
20300.890.002.2

Common Yellowthroat Survey Routes in Idaho

Routes recording Common Yellowthroat in Idaho.
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 →
Naples2820251972
Joel2020241999
Coolin920251986
Picabo720211991
Challis420121978
Nezperce320122005
Leadore320131977
Henry319831983
Pierce320072003
Bates320191990
Pasadena Val319891989
Cape Horn220251996
Rochat Divde220251998
Featherville219921989
Mud Lake220251993
Cedar Hill220241994
Preston220221988
Blackft Res120092009
Mivoden120251978
Avery120182018
Gifford120151971
Golden120141993
Baker120231975
Cascade119701970
N Fork Cda R120191993

Common Yellowthroat Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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