BirdAnalyst
Species · BCR 19 · BBS 2026 Release · 1966–2025

Willet In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieShorebirds

Willet in Central Mixed Grass Prairie has surged: up 473% on the route-weighted index since 1972.

+473%Since 1972TrendPercent 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 →
8Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
50YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for Willet in Central Mixed Grass Prairie. See the full index history below.

Willet In Central Mixed Grass Prairie Population Forecast

If the recent trend holds, Willet in Central Mixed Grass Prairie is projected to fall about 46% by 2030 — from 0.26 in 2025 to a central estimate of 0.14 (95% range 0.00–0.30). A 5-year backtest shows a typical error of ±327.9%, with 100% of held-out values landing inside the 95% band.

-46%Change by 2030TrendPercent 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 →
0.14Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.3095% 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 →
±327.9%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, Willet in Central Mixed Grass Prairie is projected to fall about 46% by 2030 — from 0.26 in 2025 to a central estimate of 0.14 (95% range 0.00–0.30). A 5-year backtest shows a typical error of ±327.9%, with 100% of held-out values landing inside the 95% band.19692030
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 →
20260.140.000.30
20270.140.000.30
20280.140.000.30
20290.140.000.30
20300.140.000.30

Routes In Central Mixed Grass Prairie

Routes recording Willet in Central Mixed Grass Prairie.
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 →
Crescent LkNEBRASKA132025
KennedyNEBRASKA62025
Piester LakeNEBRASKA22018
Swan LakeNEBRASKA12023
JohnstownNEBRASKA11978
GordonNEBRASKA12024
BrownleeNEBRASKA12019
NenzelNEBRASKA12019

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.