Species · Washington · BBS 2025 Release · 1966–2024
Mountain Chickadee Population Trend in Washington
Mountain Chickadee in Washington has declined: down 33% on the route-weighted index since 1970.
-33%Since 1970
38Routes In State
56Years
Notable Mountain Chickadee Trends in Washington
No notable trend signals for Mountain Chickadee in Washington. See the full index history below.
Mountain Chickadee Population Forecast in Washington
If the recent trend holds, Mountain Chickadee in Washington is projected to rise about 11% by 2029 — from 1.6 in 2024 to a central estimate of 1.8 (95% range 0.47–3.1). A 5-year backtest shows a typical error of ±71.6%, with 100% of held-out values landing inside the 95% band.
+11%Change by 2029
1.8Projected 2029 index
0.47–3.195% range
±71.6%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.7 | 0.44 | 3.0 |
| 2026 | 1.7 | 0.45 | 3.0 |
| 2027 | 1.8 | 0.45 | 3.0 |
| 2028 | 1.8 | 0.46 | 3.1 |
| 2029 | 1.8 | 0.47 | 3.1 |
Mountain Chickadee Survey Routes in Washington
| Omak Creek | 19 | 2024 | 1996 |
| Curlew | 13 | 2013 | 1992 |
| Twin Lakes | 12 | 2024 | 1983 |
| L Pend O Nwr | 11 | 2024 | 1995 |
| Mazama | 11 | 2022 | 1993 |
| Cloverland | 10 | 2024 | 1993 |
| Keller | 9 | 2007 | 1968 |
| Deer Park | 8 | 2015 | 1994 |
| L. Wenatchee | 7 | 2024 | 1993 |
| Chewelah | 6 | 2019 | 1977 |
| Tonasket | 5 | 2013 | 1990 |
| Blewett Pass | 5 | 2024 | 1992 |
| Lake Chelan | 5 | 2024 | 1988 |
| Ardenvoir | 4 | 1987 | 1969 |
| Ronald | 4 | 2024 | 1973 |
| Pomeroy | 4 | 2009 | 1993 |
| Laurier | 4 | 2022 | 1995 |
| Northport | 4 | 2024 | 1996 |
| E. Mt. Adams | 3 | 2023 | 1995 |
| Rimrock | 3 | 2024 | 1968 |
| Sullivan Lake 2 | 3 | 2024 | 2001 |
| Leavenworth | 3 | 2024 | 1981 |
| Carlton | 3 | 2022 | 1992 |
| Mt Rainier | 3 | 2019 | 1995 |
| Winthrop | 2 | 2015 | 1983 |
Mountain Chickadee Population Trend in Other States
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.