Species · Oregon · BBS 2025 Release · 1966–2024
Eared Grebe Population Trend in Oregon
Eared Grebe in Oregon has declined: down 39% on the route-weighted index since 1972.
-39%Since 1972
13Routes In State
48Years
Notable Eared Grebe Trends in Oregon
No notable trend signals for Eared Grebe in Oregon. See the full index history below.
Eared Grebe Population Forecast in Oregon
If the recent trend holds, Eared Grebe in Oregon is projected to fall about 90% by 2029 — from 0.59 in 2024 to a central estimate of 0.06 (95% range 0.00–1.3). A 5-year backtest shows a typical error of ±135.2%, with 100% of held-out values landing inside the 95% band.
-90%Change by 2029
0.06Projected 2029 index
0.00–1.395% range
±135.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.12 | 0.00 | 1.4 |
| 2026 | 0.10 | 0.00 | 1.4 |
| 2027 | 0.09 | 0.00 | 1.4 |
| 2028 | 0.07 | 0.00 | 1.4 |
| 2029 | 0.06 | 0.00 | 1.3 |
Eared Grebe Survey Routes in Oregon
| Warner Vally | 53 | 2024 | 1994 |
| Three Forks | 10 | 2011 | 2011 |
| Modoc Point | 4 | 2010 | 1971 |
| Catlow Rim | 3 | 2023 | 2015 |
| Barnes Val | 2 | 1985 | 1971 |
| Blizzard Gap | 2 | 2024 | 1993 |
| Fish Lake | 2 | 2023 | 1983 |
| Merrill | 1 | 1994 | 1994 |
| Harney Lake | 1 | 1994 | 1994 |
| Lorane | 1 | 1994 | 1994 |
| Dell Spring | 1 | 1983 | 1970 |
| Flook Lake | 1 | 2006 | 1996 |
| Princeton | 1 | 1982 | 1979 |
Eared Grebe Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.