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Species · Ohio · BBS 2025 Release · 1966–2024

Common Nighthawk Population Trend in Ohio

All statesAerial insectivores

Common Nighthawk in Ohio has declined: down 46% on the route-weighted index since 1969.

-46%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 →
26Routes 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 →
46YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable Common Nighthawk 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 Common Nighthawk in Ohio. See the full index history below.

Common Nighthawk Population Forecast in Ohio

If the recent trend holds, Common Nighthawk in Ohio is projected to fall about 74% by 2027 — from 0.10 in 2022 to a central estimate of 0.03 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±42.9%, with 100% of held-out values landing inside the 95% band.

-74%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 →
0.03Projected 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 →
0.00–0.1495% 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 →
±42.9%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, Common Nighthawk in Ohio is projected to fall about 74% by 2027 — from 0.10 in 2022 to a central estimate of 0.03 (95% range 0.00–0.14). A 5-year backtest shows a typical error of ±42.9%, with 100% of held-out values landing inside the 95% band.19662027
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 →
20230.040.000.15
20240.030.000.15
20250.030.000.14
20260.030.000.14
20270.030.000.14

Common Nighthawk Survey Routes in Ohio

Routes recording Common Nighthawk 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 →
Peru519691969
Rome519771972
Ashley419921988
Lockport220222018
N Baltimore219931993
Wayland219931993
Marion219661966
Westerville219851966
Napoleon120221972
Kunkle120222022
Pittsfield120132013
Bismark119761976
Middlefield119731973
Strongsville119791979
Herner Crns119831967
W Carrollton120041989
Kenton120032003
New Dover119911991
Fulton119721972
Meadowbrook119941983
Newcomerstwn119861973
Dunlap119791979
Newport119761976
Hebron120151991
Ash Ridge119921992

Common Nighthawk Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaoklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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