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

Great Horned Owl Population Trend in Oregon

All statesGeneralists

Great Horned Owl in Oregon has fallen sharply: down 54% on the route-weighted index since 1970.

-54%Since 1970
96Routes In State
56Years

Notable Great Horned Owl Trends in Oregon

long arc declinecomputed index

Great Horned Owl has fallen sharply in Oregon: down 54% on the route-weighted index since 1970.

Great Horned Owl Population Forecast in Oregon

If the recent trend holds, Great Horned Owl in Oregon is projected to fall about 34% by 2029 — from 0.18 in 2024 to a central estimate of 0.12 (95% range 0.00–0.30). A 5-year backtest shows a typical error of ±45.2%, with 100% of held-out values landing inside the 95% band.

-34%Change by 2029
0.12Projected 2029 index
0.00–0.3095% range
±45.2%Backtest error
19682029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.130.000.31
20260.130.000.31
20270.120.000.31
20280.120.000.31
20290.120.000.30

Great Horned Owl Survey Routes in Oregon

Routes recording Great Horned Owl in Oregon.
Montague320241980
Clover Creek319891974
Modoc Point 2320242024
Summit Pr320101980
Tualatin219761976
Lone Rock220241999
Wickiup220151970
Bridgeport220071986
Joseph219731973
Dayton219901974
Mount Vernon220221986
Silver Creek220241984
Secret Val219841980
Wizard Falls220122001
Emigrant Lake 2220172017
Badger Creek220161995
Mikkalo220122012
Howard Mdws.219991999
Barnhouse220122012
Coquille219941994
Bald Mtn.219961996
Green Mtn.220001996
Monument220082008
Lorane220232022
Paunina220112011

Great Horned Owl Population Trend in Other States

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

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