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

Trumpeter Swan Population Trend in Wyoming

All statesWaterfowl

Trumpeter Swan in Wyoming has surged: up 441% on the route-weighted index since 1992.

+441%Since 1992
13Routes In State
32Years

Notable Trumpeter Swan Trends in Wyoming

long arc increasecomputed index

Trumpeter Swan has surged in Wyoming: up 441% on the route-weighted index since 1992.

Trumpeter Swan Population Forecast in Wyoming

If the recent trend holds, Trumpeter Swan in Wyoming is projected to stay roughly flat through 2029, near 0.24 (95% range 0.09–0.39). A 5-year backtest shows a typical error of ±18.7%, with 100% of held-out values landing inside the 95% band.

-4%Change by 2029
0.24Projected 2029 index
0.09–0.3995% range
±18.7%Backtest error
19882029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.210.070.36
20260.220.070.37
20270.230.080.37
20280.230.080.38
20290.240.090.39

Trumpeter Swan Survey Routes in Wyoming

Routes recording Trumpeter Swan in Wyoming.
Fontenelle1720242011
Seedskadee220161997
Seedskadee 2220242024
Ryegrass220162016
Alpine219981995
Mammoth220242004
Hunter Peak120022002
Ne Entrance120181988
Moose120211998
Yellowstone120211988
Boulder120231998
Moran120162016
Mtn View120242024

Trumpeter Swan Population Trend in Other States

alaskaarkansasidahoiowamichiganminnesotamontananebraskanevadanorth-dakotaohiooregonsouth-dakotautahwashingtonwisconsin

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