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Species · Wyoming · BBS 2026 Release · 1966–2025

Bullock's Oriole Population Trend in Wyoming

All statesForest birds

Bullock's Oriole in Wyoming has increased: up 33% on the route-weighted index since 1970.

+33%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 →
82Routes 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 →
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 Bullock's Oriole Trends in WyomingNotable 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 Bullock's Oriole in Wyoming. See the full index history below.

Bullock's Oriole Population Forecast in Wyoming

If the recent trend holds, Bullock's Oriole in Wyoming is projected to fall about 11% by 2030 — from 1.7 in 2025 to a central estimate of 1.5 (95% range 0.85–2.1). A 5-year backtest shows a typical error of ±10.7%, with 100% of held-out values landing inside the 95% band.

-11%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 →
1.5Projected 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 →
0.85–2.195% 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 →
±10.7%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, Bullock's Oriole in Wyoming is projected to fall about 11% by 2030 — from 1.7 in 2025 to a central estimate of 1.5 (95% range 0.85–2.1). A 5-year backtest shows a typical error of ±10.7%, with 100% 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 →
20261.50.812.1
20271.50.822.1
20281.50.832.1
20291.50.842.1
20301.50.852.1

Bullock's Oriole Survey Routes in Wyoming

Routes recording Bullock's Oriole in Wyoming.
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 →
Wyarno4220251974
Lingle1820241980
Green River1119841977
Dwyer920251994
Sussex920251992
Thunder Basin920252012
Ethete820251992
Basin720251970
Arvada720251983
Riverview720251997
Midvale620251987
Dayton620251980
Meadowdale620251983
Raven520251995
Yoder420251969
Frannie420232000
Harmony420222021
Cody320251983
Otto320251970
Sundance320241975
Seely320001990
Gebo320251980
Mayoworth320241982
Gvnt Valley320251996
Redbird219891968

Bullock's Oriole Population Trend in Other States

arizonacaliforniacoloradoidahokansasmontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwashington

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