Species · Montana · BBS 2025 Release · 1966–2024
Blue-winged Teal Population Trend in Montana
Blue-winged Teal in Montana has held roughly steady: up 4% on the route-weighted index since 1970.
+4%Since 1970
68Routes In State
55Years
Notable Blue-winged Teal Trends in Montana
No notable trend signals for Blue-winged Teal in Montana. See the full index history below.
Blue-winged Teal Population Forecast in Montana
If the recent trend holds, Blue-winged Teal in Montana is projected to fall about 49% by 2029 — from 1.0 in 2024 to a central estimate of 0.52 (95% range 0.00–1.9). A 5-year backtest shows a typical error of ±61.8%, with 80% of held-out values landing inside the 95% band.
-49%Change by 2029
0.52Projected 2029 index
0.00–1.995% range
±61.8%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.58 | 0.00 | 2.0 |
| 2026 | 0.57 | 0.00 | 1.9 |
| 2027 | 0.55 | 0.00 | 1.9 |
| 2028 | 0.54 | 0.00 | 1.9 |
| 2029 | 0.52 | 0.00 | 1.9 |
Blue-winged Teal Survey Routes in Montana
| Westby | 30 | 2024 | 2015 |
| Hay Lake | 8 | 2019 | 1990 |
| Cleveland | 7 | 2023 | 1979 |
| Augusta | 7 | 2021 | 1976 |
| Webster | 7 | 2024 | 1978 |
| Jordan | 6 | 2024 | 1968 |
| Locate | 6 | 2024 | 1982 |
| Pablo Res. | 5 | 2023 | 1995 |
| Malta | 4 | 2024 | 1975 |
| Polson | 4 | 1999 | 1988 |
| Circle | 4 | 2023 | 1969 |
| Ingomar | 4 | 2004 | 1970 |
| East Glacier Park | 4 | 2021 | 2019 |
| Ester Lake | 4 | 2024 | 2015 |
| Saco | 4 | 2019 | 2019 |
| Dinosaurs H.M. | 4 | 2024 | 2019 |
| Virgelle | 3 | 2024 | 1979 |
| Willow Creek 2 | 3 | 2001 | 1982 |
| Great Falls | 3 | 2023 | 1972 |
| Highwood | 3 | 2023 | 1968 |
| Two Dot | 3 | 2024 | 1987 |
| Forsyth | 3 | 2018 | 1995 |
| Albion | 3 | 2014 | 1982 |
| Winifred | 3 | 2023 | 2023 |
| Jordan South | 3 | 2024 | 2016 |
Blue-winged Teal Population Trend in Other States
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Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.