Species · California · BBS 2025 Release · 1966–2024
Western Screech-Owl Population Trend in California
Western Screech-Owl in California has edged up: up 24% on the route-weighted index since 1973.
+24%Since 1973
54Routes In State
47Years
Notable Western Screech-Owl Trends in California
No notable trend signals for Western Screech-Owl in California. See the full index history below.
Western Screech-Owl Population Forecast in California
If the recent trend holds, Western Screech-Owl in California is projected to stay roughly flat through 2029, near 0.01 (95% range 0.00–0.04). A 5-year backtest shows a typical error of ±46.4%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2029
0.01Projected 2029 index
0.00–0.0495% range
±46.4%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.01 | 0.00 | 0.04 |
| 2026 | 0.01 | 0.00 | 0.04 |
| 2027 | 0.01 | 0.00 | 0.04 |
| 2028 | 0.01 | 0.00 | 0.04 |
| 2029 | 0.01 | 0.00 | 0.04 |
Western Screech-Owl Survey Routes in California
| Higgins Corn | 4 | 1997 | 1995 |
| Woodfords | 2 | 1993 | 1993 |
| Cal Hot Spgs | 2 | 2012 | 2012 |
| Mesa Grande | 2 | 1995 | 1995 |
| Adelaida | 2 | 1981 | 1974 |
| Kelso Valley | 1 | 2023 | 1973 |
| Nubieber | 1 | 1986 | 1986 |
| Crescent Cty | 1 | 2005 | 1989 |
| Honeydew | 1 | 2013 | 1976 |
| Kings Canyon | 1 | 2024 | 2024 |
| Red Bluff | 1 | 2017 | 2017 |
| Lassen Park | 1 | 1988 | 1988 |
| Lake Cachuma | 1 | 2013 | 2013 |
| Gazelle | 1 | 1994 | 1994 |
| Hullville | 1 | 1996 | 1996 |
| Rumsey | 1 | 1985 | 1982 |
| Gold Hill | 1 | 2023 | 2023 |
| Burnt Ranch | 1 | 2016 | 2007 |
| Longvale | 1 | 2013 | 1977 |
| Redding | 1 | 1979 | 1979 |
| Macdoel | 1 | 1976 | 1976 |
| Mt Pinos | 1 | 1983 | 1969 |
| Moraga | 1 | 2004 | 1987 |
| Offield Mtn | 1 | 1980 | 1980 |
| Glen Ellen 2 | 1 | 2022 | 2022 |
Western Screech-Owl Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.