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

Eastern Whip-poor-will Population Trend in Indiana

All statesAerial insectivores

Eastern Whip-poor-will in Indiana has collapsed: down 86% on the route-weighted index since 1969.

-86%Since 1969TrendPercent 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 →
24Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Eastern Whip-poor-will Trends in IndianaNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Eastern Whip-poor-will has collapsed in Indiana: down 86% on the route-weighted index since 1969.

Eastern Whip-poor-will Population Forecast in Indiana

If the recent trend holds, Eastern Whip-poor-will in Indiana is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±44.9%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2028TrendPercent 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 →
0.00Projected 2028 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.3695% 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 →
±44.9%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, Eastern Whip-poor-will in Indiana is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.36). A 5-year backtest shows a typical error of ±44.9%, with 100% of held-out values landing inside the 95% band.19662028
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 →
20240.010.000.37
20250.000.000.36
20260.000.000.36
20270.000.000.36
20280.000.000.36

Eastern Whip-poor-will Survey Routes in Indiana

Routes recording Eastern Whip-poor-will in Indiana.
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 →
South Bend319761976
Brazil319891989
Brookville220001976
Cumback219831966
Knox119841984
Hoosier120041990
Middlebury120192014
Indiana Dune120181994
W Lafayette119831981
Galveston119841984
Tipton119921975
Pimento119951981
Belmont120021981
Spencer119881970
Milroy119691969
Millersburg120081981
Indian Spgs120081982
Clear Spring120071981
New Phila120181982
Corydon119961972
Vevay119981969
Scottsburg119821982
Georgia120231999
Anderson120142014

Eastern Whip-poor-will Population Trend in Other States

alabamaarkansasconnecticutdelawaregeorgiaillinoisiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin

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