Species · Illinois · BBS 2025 Release · 1966–2024
Eastern Whip-poor-will Population Trend in Illinois
Eastern Whip-poor-will in Illinois has fallen sharply: down 68% on the route-weighted index since 1968.
-68%Since 1968
37Routes In State
55Years
Notable Eastern Whip-poor-will Trends in Illinois
long arc declinecomputed index
Eastern Whip-poor-will has fallen sharply in Illinois: down 68% on the route-weighted index since 1968.
Eastern Whip-poor-will Population Forecast in Illinois
If the recent trend holds, Eastern Whip-poor-will in Illinois is projected to stay roughly flat through 2028, near 0.00 (95% range 0.00–0.34). A 5-year backtest shows a typical error of ±454.3%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.00Projected 2028 index
0.00–0.3495% range
±454.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.00 | 0.00 | 0.34 |
| 2025 | 0.00 | 0.00 | 0.34 |
| 2026 | 0.00 | 0.00 | 0.34 |
| 2027 | 0.00 | 0.00 | 0.34 |
| 2028 | 0.00 | 0.00 | 0.34 |
Eastern Whip-poor-will Survey Routes in Illinois
| Chandlervill | 3 | 1972 | 1972 |
| Martinsville | 3 | 2019 | 1970 |
| Robinson | 3 | 1973 | 1970 |
| Yale | 3 | 2009 | 1996 |
| Athens | 2 | 1996 | 1995 |
| Terre Haute | 2 | 1984 | 1984 |
| Deer Creek | 2 | 1969 | 1969 |
| Athensville | 2 | 2015 | 1975 |
| Janesville | 2 | 1982 | 1982 |
| Bradbury | 2 | 2017 | 1982 |
| Belknap | 2 | 1993 | 1970 |
| Eldred | 2 | 2004 | 2004 |
| Putnam | 1 | 1980 | 1976 |
| Sheffield | 1 | 1993 | 1993 |
| Stillwell | 1 | 1993 | 1976 |
| Monica | 1 | 1990 | 1990 |
| Mackinaw | 1 | 1973 | 1967 |
| Melrose | 1 | 1990 | 1973 |
| Bluff Spgs | 1 | 1975 | 1974 |
| Pawnee | 1 | 1971 | 1971 |
| Clarksdale | 1 | 1992 | 1968 |
| Humphrey | 1 | 1978 | 1978 |
| Columbia | 1 | 1981 | 1966 |
| Beaucoup | 1 | 1971 | 1971 |
| Mt Vernon | 1 | 1999 | 1972 |
Eastern Whip-poor-will Population Trend in Other States
alabamaarkansasconnecticutdelawaregeorgiaindianaiowakansaskentuckymainemarylandmassachusettsmichiganminnesotamississippimissourinebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsin
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.