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

Gadwall Population Trend in Nevada

All statesWaterfowl

Gadwall in Nevada has risen sharply: up 74% on the route-weighted index since 1971.

+74%Since 1971
23Routes In State
43Years

Notable Gadwall Trends in Nevada

long arc increasecomputed index

Gadwall has risen sharply in Nevada: up 74% on the route-weighted index since 1971.

Gadwall Population Forecast in Nevada

If the recent trend holds, Gadwall in Nevada is projected to rise about 149% by 2029 — from 0.50 in 2024 to a central estimate of 1.2 (95% range 0.00–2.7). A 5-year backtest shows a typical error of ±579.5%, with 60% of held-out values landing inside the 95% band.

+149%Change by 2029
1.2Projected 2029 index
0.00–2.795% range
±579.5%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
20251.20.002.7
20261.20.002.7
20271.20.002.7
20281.20.002.7
20291.20.002.7

Gadwall Survey Routes in Nevada

Routes recording Gadwall in Nevada.
Ruby Valley2020001997
Virgin Creek920181995
Majors Place819991968
Cortez420241968
Toiyabe Nf420102010
Nixon420092009
Bald Mtn.420241992
Chimney Res.420242023
Dobbin Creek320161972
Fallon320221993
Dinner Sta219711971
Ranchogrande219951995
Eureka220001990
Ruby Valley 2220212004
Hiko220011970
Gardnerville 2220242024
Midas120191996
Sand Pass120122010
Sheldon Nwr120092001
Austin120172017
Ash Meadows120192010
Illipah120182013
Gardnerville120051996

Gadwall Population Trend in Other States

alaskaarizonacaliforniacoloradodelawareidahoillinoisiowakansasmassachusettsmichiganminnesotamissourimontananebraskanew-jerseynew-mexiconew-yorknorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-dakotatexasutahvermontwashingtonwisconsinwyoming

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