Species · California · BBS 2025 Release · 1966–2024
Canada Jay Population Trend in California
Canada Jay in California has declined: down 42% on the route-weighted index since 1977.
-42%Since 1977
13Routes In State
26Years
Notable Canada Jay Trends in California
No notable trend signals for Canada Jay in California. See the full index history below.
Canada Jay Population Forecast in California
If the recent trend holds, Canada Jay in California is projected to stay roughly flat through 2026, near 0.03 (95% range 0.00–0.07). A 5-year backtest shows a typical error of ±155%, with 100% of held-out values landing inside the 95% band.
n/aChange by 2026
0.03Projected 2026 index
0.00–0.0795% range
±155%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2022 | 0.03 | 0.00 | 0.07 |
| 2023 | 0.03 | 0.00 | 0.07 |
| 2024 | 0.03 | 0.00 | 0.07 |
| 2025 | 0.03 | 0.00 | 0.07 |
| 2026 | 0.03 | 0.00 | 0.07 |
Canada Jay Survey Routes in California
| Fall River Mills | 7 | 1998 | 1998 |
| Medicine Mtn. | 5 | 2014 | 2000 |
| Navarro | 5 | 1973 | 1973 |
| Redwood N.P. 2 | 5 | 2012 | 2012 |
| Tionesta | 3 | 2019 | 2008 |
| Offield Mtn | 2 | 2009 | 2009 |
| Junction Cty | 1 | 1980 | 1980 |
| Ship Mtn. | 1 | 2014 | 2014 |
| Bartle | 1 | 2021 | 1983 |
| Rio Dell | 1 | 2012 | 1977 |
| Mt Shasta | 1 | 2001 | 1976 |
| Chester | 1 | 1999 | 1999 |
| Goumaz | 1 | 2010 | 2001 |
Canada Jay Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.