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Species · Idaho · BBS 2025 Release · 1966–2024

Bullock's Oriole Population Trend in Idaho

All statesGeneralists

Bullock's Oriole in Idaho has risen sharply: up 58% on the route-weighted index since 1970.

+58%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 →
47Routes 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 Bullock's Oriole 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 →

Bullock's Oriole has risen sharply in Idaho: up 58% on the route-weighted index since 1970.

Bullock's Oriole Population Forecast in Idaho

If the recent trend holds, Bullock's Oriole in Idaho is projected to fall about 13% by 2029 — from 2.2 in 2024 to a central estimate of 1.9 (95% range 0.93–2.8). A 5-year backtest shows a typical error of ±21.8%, with 100% of held-out values landing inside the 95% band.

-13%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 →
1.9Projected 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 →
0.93–2.895% 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 →
±21.8%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, Bullock's Oriole in Idaho is projected to fall about 13% by 2029 — from 2.2 in 2024 to a central estimate of 1.9 (95% range 0.93–2.8). A 5-year backtest shows a typical error of ±21.8%, 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 →
20251.80.862.8
20261.80.882.8
20271.80.892.8
20281.90.912.8
20291.90.932.8

Bullock's Oriole Survey Routes in Idaho

Routes recording Bullock's Oriole 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 →
Preston1520231988
Pasadena Val1520161987
Pocatello1320191979
Glenns Ferry1119861968
Dubois920241989
Baker820241974
Cascade819831983
Silver City820241994
Picabo820211988
Magic Mtn720241987
Almo720231988
Triangle520241985
Centerville420191972
Springfield420171969
Crane Creek420191988
Featherville420241989
Gifford320171971
Squirrel320241971
Mud Lake320231989
Cedar Hill320241992
Naples220241975
Nezperce219921992
Kyle Canyon220221999
Tractor Flat220101995
Blacks Creek220161971

Bullock's Oriole Population Trend in Other States

arizonacaliforniacoloradokansasmontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwashingtonwyoming

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