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

Ruffed Grouse Population Trend in Ohio

All statesGeneralists

Ruffed Grouse in Ohio has declined: down 40% on the route-weighted index since 1974.

-40%Since 1974TrendPercent 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 →
19Routes 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 →
26YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Ruffed Grouse Trends in OhioNotable 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 Ruffed Grouse in Ohio. See the full index history below.

Ruffed Grouse Population Forecast in Ohio

If the recent trend holds, Ruffed Grouse in Ohio is projected to stay roughly flat through 2023, near 0.02 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±88%, with 100% of held-out values landing inside the 95% band.

n/aChange by 2023TrendPercent 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 →
0.02Projected 2023 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.0795% 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 →
±88%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, Ruffed Grouse in Ohio is projected to stay roughly flat through 2023, near 0.02 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±88%, with 100% of held-out values landing inside the 95% band.19692023
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 →
20190.030.000.07
20200.030.000.07
20210.020.000.07
20220.020.000.07
20230.020.000.07

Ruffed Grouse Survey Routes in Ohio

Routes recording Ruffed Grouse in Ohio.
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 →
Tick Ridge619951995
Shawnee S.F.219941993
Winterset219801974
Wayne N.F.119941994
Zaleski S.F.119971993
Tar Hollow120141995
Scioto Trail120052005
Pike S.F.120022002
Garrettsvile119831969
Lenox119751973
Lattasburg119761976
Dresden119941982
Adamsville119891989
South Olive120151994
Shawnee S.F. 2120062006
Ray119981994
Coal Run119881981
Rome120181984
Greasy Ridge119901990

Ruffed Grouse Population Trend in Other States

alaskaarkansascaliforniaconnecticutgeorgiaidahoindianaiowakentuckymainemarylandmassachusettsmichiganminnesotamontananevadanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaoregonpennsylvaniarhode-islandsouth-dakotatennesseeutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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