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Species · BCR 19 · BBS 2025 Release · 1966–2024

Willet In Central Mixed Grass Prairie

All regionsCentral Mixed Grass PrairieShorebirds

Willet in Central Mixed Grass Prairie has surged: up 77% on the route-weighted index since 1972.

+77%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 →
49YearsYears 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 stay roughly flat through 2029, near 0.13 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±458.3%, with 80% of held-out values landing inside the 95% band.

n/aChange by 2029TrendPercent 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 →
0.13Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2995% 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 →
±458.3%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 stay roughly flat through 2029, near 0.13 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±458.3%, with 80% of held-out values landing inside the 95% band.19692029
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 →
20250.130.000.28
20260.130.000.28
20270.130.000.29
20280.130.000.29
20290.130.000.29

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 →
Piester LakeNEBRASKA22018
Crescent LkNEBRASKA22014
Swan LakeNEBRASKA12023
JohnstownNEBRASKA11978
KennedyNEBRASKA12024
GordonNEBRASKA12024
BrownleeNEBRASKA12019
NenzelNEBRASKA12019

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