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

Purple Finch Population Trend in Ohio

All statesGeneralists

Purple Finch in Ohio has edged up: up 12% on the route-weighted index since 1969.

+12%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 →
17Routes 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 →
50YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Purple Finch 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 Purple Finch in Ohio. See the full index history below.

Purple Finch Population Forecast in Ohio

If the recent trend holds, Purple Finch in Ohio is projected to stay roughly flat through 2027, near 0.05 (95% range 0.00–0.24). A 5-year backtest shows a typical error of ±217.4%, with 100% of held-out values landing inside the 95% band.

+0%Change by 2027TrendPercent 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 →
0.05Projected 2027 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
0.00–0.2495% 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 →
±217.4%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, Purple Finch in Ohio is projected to stay roughly flat through 2027, near 0.05 (95% range 0.00–0.24). A 5-year backtest shows a typical error of ±217.4%, with 100% of held-out values landing inside the 95% band.19672027
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 →
20230.060.000.24
20240.060.000.24
20250.060.000.24
20260.060.000.24
20270.050.000.24

Purple Finch Survey Routes in Ohio

Routes recording Purple Finch 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 →
Middlefield519951971
Bismark319871981
Wayland319991995
Garrettsvile319911981
Valley City219961996
Pittsfield120142000
Mohican S.F.120221992
Baxter Ridge120192019
Strongsville119841969
Dell119971997
Hiram120191992
Lenox120181967
Herner Crns119941972
Smithfield119901990
New Somerset119911991
Birmingham120221996
Petersburg120041996

Purple Finch Population Trend in Other States

alaskacaliforniaconnecticutindianamainemarylandmassachusettsmichiganminnesotanew-hampshirenew-jerseynew-yorknorth-dakotaoregonpennsylvaniarhode-islandvermontwashingtonwest-virginiawisconsin

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