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Species · Nevada · BBS 2025 Release · 1966–2024

Bullock's Oriole Population Trend in Nevada

All statesGeneralists

Bullock's Oriole in Nevada has increased: up 42% on the route-weighted index since 1970.

+42%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 →
48YearsYears 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 NevadaNotable 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 Nevada. See the full index history below.

Bullock's Oriole Population Forecast in Nevada

If the recent trend holds, Bullock's Oriole in Nevada is projected to rise about 16% by 2029 — from 1.1 in 2024 to a central estimate of 1.3 (95% range 0.23–2.4). A 5-year backtest shows a typical error of ±66.5%, with 100% of held-out values landing inside the 95% band.

+16%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 →
1.3Projected 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 →
0.23–2.495% 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 →
±66.5%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 Nevada is projected to rise about 16% by 2029 — from 1.1 in 2024 to a central estimate of 1.3 (95% range 0.23–2.4). A 5-year backtest shows a typical error of ±66.5%, 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 →
20251.30.192.4
20261.30.202.4
20271.30.212.4
20281.30.222.4
20291.30.232.4

Bullock's Oriole Survey Routes in Nevada

Routes recording Bullock's Oriole in Nevada.
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 →
Ruby Valley1120011997
Majors Place720241968
Willis720241988
Piute Mdws620242005
Oreana620032002
Hiko420231968
Cortez320231969
Carson River320052001
Virgin Creek320181995
Desert Nwr219951995
Ranchogrande220162001
Rye Patch219871969
Toiyabe Nf220242007
Ruby Valley 2220212005
Meadow Vally220181996
Dobbin Creek219741971
Caliente220152013
Val Of Fire220062006
Nelson220242002
Humboldt Nf220181994
Darroughs Hot Spgs220242024
Dinner Sta119921971
Sand Pass120241993
Fish Creek119981998
Walker Can119871982

Bullock's Oriole Population Trend in Other States

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