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Species · Idaho · BBS 2025 Release · 1966–2024

Eastern Kingbird Population Trend in Idaho

All statesAerial insectivores

Eastern Kingbird in Idaho has fallen sharply: down 62% on the route-weighted index since 1970.

-62%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 →
43Routes 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 →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eastern Kingbird 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 declinecomputed 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 →

Eastern Kingbird has fallen sharply in Idaho: down 62% on the route-weighted index since 1970.

Eastern Kingbird Population Forecast in Idaho

If the recent trend holds, Eastern Kingbird in Idaho is projected to fall about 63% by 2029 — from 0.68 in 2024 to a central estimate of 0.25 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±62.7%, with 100% of held-out values landing inside the 95% band.

-63%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 →
0.25Projected 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 →
0.00–1.295% 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 →
±62.7%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, Eastern Kingbird in Idaho is projected to fall about 63% by 2029 — from 0.68 in 2024 to a central estimate of 0.25 (95% range 0.00–1.2). A 5-year backtest shows a typical error of ±62.7%, with 100% of held-out values landing inside the 95% band.19682029
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 →
20250.310.001.2
20260.300.001.2
20270.280.001.2
20280.270.001.2
20290.250.001.2

Eastern Kingbird Survey Routes in Idaho

Routes recording Eastern Kingbird 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 →
Coolin820241988
Kyle Canyon420222008
Crane Creek420191988
Naples320241972
Gifford320171971
Baker320241975
Dubois320231972
Pocatello319891984
Preston320231988
Blackft Res220031991
Grangeville219871987
Cascade219811971
Leadore220192007
Tractor Flat220151988
Alturas219681968
Triangle220241990
Glenns Ferry219861969
Circular Bu220072007
Joel220221989
Picabo220211988
Carey219891989
Hot Spring219971996
Nezperce120081968
Twin Buttes120231989
Golden120082008

Eastern Kingbird Population Trend in Other States

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

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