BirdAnalyst
Species · Wyoming · BBS 2025 Release · 1966–2024

Bald Eagle Population Trend in Wyoming

All statesGeneralists

Bald Eagle in Wyoming has surged: up 711% on the route-weighted index since 1987.

+711%Since 1987TrendPercent 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 →
50Routes 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 →
36YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Bald Eagle 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 →

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 →

Bald Eagle has surged in Wyoming: up 711% on the route-weighted index since 1987.

Bald Eagle Population Forecast in Wyoming

If the recent trend holds, Bald Eagle in Wyoming is projected to rise about 13% by 2029 — from 0.28 in 2024 to a central estimate of 0.32 (95% range 0.17–0.47). A 5-year backtest shows a typical error of ±38.4%, with 40% 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 →
0.32Projected 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 →
0.17–0.4795% 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 →
±38.4%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, Bald Eagle in Wyoming is projected to rise about 13% by 2029 — from 0.28 in 2024 to a central estimate of 0.32 (95% range 0.17–0.47). A 5-year backtest shows a typical error of ±38.4%, with 40% of held-out values landing inside the 95% band.19832029
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 →
20250.280.130.44
20260.290.140.45
20270.300.150.45
20280.310.160.46
20290.320.170.47

Bald Eagle Survey Routes in Wyoming

Routes recording Bald Eagle 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 →
Fontenelle620242009
Warbonnet520242010
Kaycee420242022
Harmony420232015
Riverside320232006
Walcott320241989
Elk Horn220152015
Brookhurst220112011
Mammoth220092002
Dayton220232010
Seedskadee 2220242024
Ethete220232023
Daniel219881988
Boulder220171999
Rawlins 2220172017
Flamin Gorge220222022
Ne Entrance120191997
Wyarno120231983
Yellowstone120221987
Prior Flats120212021
Colter Bay119961996
Dubois120232019
Rozet120232023
Dwyer120192006
Seely 2120232001

Bald Eagle Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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