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

Willet Population Trend in Idaho

All statesShorebirds

Willet in Idaho has fallen sharply: down 56% on the route-weighted index since 1972.

-56%Since 1972
20Routes In State
52Years

Notable Willet Trends in Idaho

long arc declinecomputed index

Willet has fallen sharply in Idaho: down 55% on the route-weighted index since 1972.

Willet Population Forecast in Idaho

If the recent trend holds, Willet in Idaho is projected to fall about 37% by 2029 — from 0.44 in 2024 to a central estimate of 0.28 (95% range 0.00–0.91). A 5-year backtest shows a typical error of ±60.1%, with 100% of held-out values landing inside the 95% band.

-37%Change by 2029
0.28Projected 2029 index
0.00–0.9195% range
±60.1%Backtest error
19702029
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
20250.300.000.93
20260.290.000.93
20270.290.000.92
20280.280.000.92
20290.280.000.91

Willet Survey Routes in Idaho

Routes recording Willet in Idaho.
Henry1019811974
Dubois920241971
Mud Lake420191988
Bates320191988
Blackft Res220181984
Kyle Canyon219991999
Tractor Flat220231989
Craters219931988
Springfield220071970
Twin Buttes120181999
Circular Bu119961996
Leadore120241987
Ririe120091986
Acequia119881979
Pocatello119791979
Iron Springs120241991
Picabo120171989
Carey119921992
Preston120091988
Pasadena Val120111990

Willet Population Trend in Other States

alabamacaliforniacoloradoconnecticutdelawarefloridalouisianamainemarylandmassachusettsminnesotamontananebraskanevadanew-jerseynew-yorknorth-carolinanorth-dakotaoregonsouth-carolinasouth-dakotatexasutahvirginiawyoming

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