BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

Hooded Warbler In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieForest birds

Hooded Warbler in Eastern Tallgrass Prairie has declined: down 39% on the route-weighted index since 1971.

-39%Since 1971TrendPercent 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 →
15Routes 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 →
21YearsYears 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 Hooded Warbler in Eastern Tallgrass Prairie. See the full index history below.

Hooded Warbler In Eastern Tallgrass Prairie Population Forecast

If the recent trend holds, Hooded Warbler in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.01). A 5-year backtest shows a typical error of ±31.9%, with 100% 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 →
0.01Projected 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 →
0.00–0.0195% 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 →
±31.9%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, Hooded Warbler in Eastern Tallgrass Prairie is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.01). A 5-year backtest shows a typical error of ±31.9%, with 100% of held-out values landing inside the 95% band.19662029
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 →
20250.010.000.01
20260.010.000.01
20270.010.000.01
20280.010.000.01
20290.010.000.01

Routes In Eastern Tallgrass Prairie

Routes recording Hooded Warbler in Eastern Tallgrass 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 →
ItascaILLINOIS11992
SheffieldILLINOIS12005
WayneILLINOIS12021
DaileyILLINOIS12005
ConcordILLINOIS12011
JamestownILLINOIS11971
GalvestonINDIANA12007
WabashINDIANA12024
WallaceINDIANA12023
New CastleINDIANA12023
WatsonMISSOURI12003
MarionOHIO11966
NorwalkOHIO12019
AshleyOHIO11999
PeoriaOKLAHOMA11969

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