Species · Ohio · BBS 2025 Release · 1966–2024
Northern Harrier Population Trend in Ohio
Northern Harrier in Ohio has held roughly steady: up 7% on the route-weighted index since 1971.
+7%Since 1971
31Routes In State
31Years
Notable Northern Harrier Trends in Ohio
No notable trend signals for Northern Harrier in Ohio. See the full index history below.
Northern Harrier Population Forecast in Ohio
If the recent trend holds, Northern Harrier in Ohio is projected to stay roughly flat through 2028, near 0.06 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±106.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2028
0.06Projected 2028 index
0.00–0.1495% range
±106.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2024 | 0.06 | 0.00 | 0.14 |
| 2025 | 0.06 | 0.00 | 0.14 |
| 2026 | 0.06 | 0.00 | 0.14 |
| 2027 | 0.06 | 0.00 | 0.14 |
| 2028 | 0.06 | 0.00 | 0.14 |
Northern Harrier Survey Routes in Ohio
| Napoleon | 3 | 1996 | 1986 |
| Bloomville | 3 | 2001 | 1997 |
| Cosmos | 2 | 1996 | 1996 |
| W Carrollton | 2 | 2004 | 2004 |
| London | 2 | 2005 | 2005 |
| Winterset | 2 | 1967 | 1967 |
| Lockport | 1 | 2023 | 1975 |
| Kunkle | 1 | 2013 | 1993 |
| N Baltimore | 1 | 1996 | 1974 |
| Pittsfield | 1 | 2017 | 1998 |
| Peru | 1 | 1971 | 1966 |
| Bismark | 1 | 1992 | 1992 |
| Stonecreek | 1 | 2002 | 1996 |
| Lenox | 1 | 2013 | 1993 |
| Herner Crns | 1 | 2003 | 1998 |
| Birmingham | 1 | 2011 | 2011 |
| Kalida | 1 | 2011 | 2011 |
| Petersburg | 1 | 1999 | 1999 |
| No Kenton | 1 | 2017 | 1967 |
| Marion | 1 | 1991 | 1991 |
| New Dover | 1 | 2000 | 1994 |
| Port William | 1 | 2017 | 2017 |
| Dresden | 1 | 2001 | 1996 |
| Cuba | 1 | 2011 | 2006 |
| Xenia | 1 | 2017 | 2004 |
Northern Harrier Population Trend in Other States
alabamaalaskaarizonaarkansascaliforniacoloradodelawaregeorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.