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Species · Idaho · BBS 2025 Release · 1966–2024

Golden-crowned Kinglet Population Trend in Idaho

All statesForest birds

Golden-crowned Kinglet in Idaho has surged: up 832% on the route-weighted index since 1975.

+832%Since 1975TrendPercent 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 →
29Routes 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 →
50YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Golden-crowned Kinglet 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 →

Golden-crowned Kinglet has surged in Idaho: up 832% on the route-weighted index since 1975.

Golden-crowned Kinglet Population Forecast in Idaho

If the recent trend holds, Golden-crowned Kinglet in Idaho is projected to rise about 107% by 2029 — from 1.0 in 2024 to a central estimate of 2.1 (95% range 0.86–3.4). A 5-year backtest shows a typical error of ±99.9%, with 80% of held-out values landing inside the 95% band.

+107%Change by 2029TrendPercent 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 →
2.1Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.86–3.495% 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 →
±99.9%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, Golden-crowned Kinglet in Idaho is projected to rise about 107% by 2029 — from 1.0 in 2024 to a central estimate of 2.1 (95% range 0.86–3.4). A 5-year backtest shows a typical error of ±99.9%, with 80% of held-out values landing inside the 95% band.19712029
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 →
20252.00.753.3
20262.10.783.4
20272.10.813.4
20282.10.833.4
20292.10.863.4

Golden-crowned Kinglet Survey Routes in Idaho

Routes recording Golden-crowned Kinglet 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 →
Grangeville2020241986
Lolo Pass1920191992
Marble Creek1920231988
Avery1820231979
Baldy Mountain1420162013
Pierce1320071990
Mivoden820231977
Cascade419841980
Salmon River420171988
Golden320141987
Rochat Divde320231993
Coolin320241986
Cabarton320051985
N Fork Cda R220191993
Challis220241975
Squirrel219841984
Joel219911990
Sunbeam219981997
Nezperce Nf219991992
Naples120241973
Gifford119711971
Nezperce120081985
Cape Horn119921988
Alturas119871987
Magic Mtn120221987

Golden-crowned Kinglet Population Trend in Other States

alaskaarizonacaliforniacoloradoconnecticutgeorgiamainemarylandmassachusettsmichiganminnesotamontananevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinaohiooregonpennsylvaniasouth-dakotatennesseeutahvermontwashingtonwest-virginiawisconsinwyoming

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