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

American White Pelican Population Trend in Wyoming

All statesWetland birds

American White Pelican in Wyoming has surged: up 606% on the route-weighted index since 1985.

+606%Since 1985TrendPercent 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 →
53Routes 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 →
41YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American White Pelican 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 →

American White Pelican has surged in Wyoming: up 606% on the route-weighted index since 1985.

American White Pelican Population Forecast in Wyoming

If the recent trend holds, American White Pelican in Wyoming is projected to rise about 54% by 2029 — from 1.5 in 2024 to a central estimate of 2.4 (95% range 0.00–5.8). A 5-year backtest shows a typical error of ±79.3%, with 100% of held-out values landing inside the 95% band.

+54%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 →
2.4Projected 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 →
0.00–5.895% 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 →
±79.3%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, American White Pelican in Wyoming is projected to rise about 54% by 2029 — from 1.5 in 2024 to a central estimate of 2.4 (95% range 0.00–5.8). A 5-year backtest shows a typical error of ±79.3%, with 100% of held-out values landing inside the 95% band.19822029
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 →
20252.30.005.7
20262.30.005.8
20272.40.005.8
20282.40.005.8
20292.40.005.8

American White Pelican Survey Routes in Wyoming

Routes recording American White Pelican 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 →
Rock River4820221990
Fontenelle4020241983
Alpine3720241990
Natrona2419921992
Nowood2220242024
Yellowstone1820221987
Kaycee1820242014
Prior Flats1520152015
Dwyer1520191992
Sweetwater1420092000
Wilson1319941993
Hayden Val1219861985
Moskee 21220192019
Flamin Gorge1220211994
Mayoworth1120112005
Leo1120021997
Colter Bay1019981991
Bill1020182018
Buford920001994
Shirley920151989
Otto820232016
Midvale820221990
Yoder720241999
Seedskadee 2620242024
Sussex620182017

American White Pelican Population Trend in Other States

alabamaarkansascaliforniacoloradoidahoiowakansaslouisianaminnesotamontananebraskanevadanew-mexiconorth-dakotaoklahomaoregonsouth-dakotatexasutahwashingtonwisconsin

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