Guild · Montana · BBS 2025 Release · 1966–2024
Waterfowl In Montana
21 species in this guild. As a group they are -17% since 1970.
Guild Signals
No notable trend signals for waterfowl in Montana. See the full index history below.
Forecast
If the recent trend holds, Waterfowl in Montana is projected to stay roughly flat through 2029, near 0.80 (95% range 0.00–1.7). A 5-year backtest shows a typical error of ±24%, with 100% of held-out values landing inside the 95% band.
+9%Change by 2029
0.80Projected 2029 index
0.00–1.795% range
±24%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 0.82 | 0.00 | 1.7 |
| 2026 | 0.82 | 0.00 | 1.7 |
| 2027 | 0.81 | 0.00 | 1.7 |
| 2028 | 0.81 | 0.00 | 1.7 |
| 2029 | 0.80 | 0.00 | 1.7 |
Member Species In Montana
| Trumpeter Swan | Anatidae | -94% |
| Barrow's Goldeneye | Anatidae | -86% |
| Common Goldeneye | Anatidae | -77% |
| American Wigeon | Anatidae | -49% |
| Northern Pintail | Anatidae | -42% |
| Wood Duck | Anatidae | -40% |
| Canvasback | Anatidae | -35% |
| Cinnamon Teal | Anatidae | -26% |
| Lesser Scaup | Anatidae | -24% |
| Green-winged Teal | Anatidae | -24% |
| Ring-necked Duck | Anatidae | -21% |
| Mallard | Anatidae | -19% |
| Gadwall | Anatidae | -7% |
| Blue-winged Teal | Anatidae | +4% |
| Northern Shoveler | Anatidae | +43% |
| Hooded Merganser | Anatidae | +67% |
| Redhead | Anatidae | +120% |
| Ruddy Duck | Anatidae | +192% |
| Bufflehead | Anatidae | +252% |
| Common Merganser | Anatidae | +313% |
| Canada Goose | Anatidae | 20× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.