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Species · Oregon · BBS 2025 Release · 1966–2024

Orange-crowned Warbler Population Trend in Oregon

All statesForest birds

Orange-crowned Warbler in Oregon has fallen sharply: down 65% on the route-weighted index since 1970.

-65%Since 1970
94Routes In State
56Years

Notable Orange-crowned Warbler Trends in Oregon

long arc declinecomputed index

Orange-crowned Warbler has fallen sharply in Oregon: down 65% on the route-weighted index since 1970.

Orange-crowned Warbler Population Forecast in Oregon

If the recent trend holds, Orange-crowned Warbler in Oregon is projected to fall about 27% by 2029 — from 1.4 in 2024 to a central estimate of 1.0 (95% range 0.00–2.2). A 5-year backtest shows a typical error of ±27.7%, with 100% of held-out values landing inside the 95% band.

-27%Change by 2029
1.0Projected 2029 index
0.00–2.295% range
±27.7%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
20251.20.062.4
20261.20.012.3
20271.10.002.3
20281.10.002.2
20291.00.002.2

Orange-crowned Warbler Survey Routes in Oregon

Routes recording Orange-crowned Warbler in Oregon.
Hazel Camp2720221975
Coquille1620241994
Hauser1419851970
Elkton1420241972
Green1220241994
Fisher1120101997
Garfield1020231975
Lorane1020241993
Secret Val920221975
Troy920241992
Harlan 2920242011
Black Mtn.820041996
Klickitat Mt819961993
Desolation819991998
Scappoose720231995
Howard Mdws.620191992
Waldport620011992
Riley Peak620161994
Timber520171968
Wedderburn520241970
Adair520241973
Dayton520221975
Svensen519921990
Granite519891989
Glasgow520241986

Orange-crowned Warbler Population Trend in Other States

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