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

Mallard Population Trend in Wyoming

All statesWaterfowl

Mallard in Wyoming has held roughly steady: down 2% on the route-weighted index since 1970.

-2%Since 1970
127Routes In State
56Years

Notable Mallard Trends in Wyoming

No notable trend signals for Mallard in Wyoming. See the full index history below.

Mallard Population Forecast in Wyoming

If the recent trend holds, Mallard in Wyoming is projected to rise about 68% by 2029 — from 1.9 in 2024 to a central estimate of 3.2 (95% range 0.96–5.5). A 5-year backtest shows a typical error of ±74.5%, with 80% of held-out values landing inside the 95% band.

+68%Change by 2029
3.2Projected 2029 index
0.96–5.595% range
±74.5%Backtest error
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 index95% low95% high
20253.20.955.5
20263.20.955.5
20273.20.965.5
20283.20.965.5
20293.20.965.5

Mallard Survey Routes in Wyoming

Routes recording Mallard in Wyoming.
Rock River6120221990
Yellowstone4120221987
Hayden Val2519861985
Seedskadee 22420242024
Anchor2120161993
Kaycee2120242024
Clark1920101990
Clarkelen1619781968
Pathfinder1520221983
Lovell1420181991
Recluse1320241982
Daniel1219881980
Baggs1220041997
Farson1120182005
Piney1019871980
Shirley1020081980
Fontenelle920241982
Brookhurst920161969
Seely920001990
Wilson920221979
Boulder920241982
Upton820241987
Diamondville819811977
Green River819841977
Patrick Draw719801973

Mallard Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsin

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