Guild · Wisconsin · BBS 2025 Release · 1966–2024
Wetland Birds In Wisconsin
20 species in this guild. As a group they are -0% since 1968.
Guild Signals
No notable trend signals for wetland birds in Wisconsin. See the full index history below.
Forecast
If the recent trend holds, Wetland birds in Wisconsin is projected to rise about 44% by 2029 — from 0.90 in 2024 to a central estimate of 1.3 (95% range 0.51–2.1). A 5-year backtest shows a typical error of ±34.3%, with 100% of held-out values landing inside the 95% band.
+44%Change by 2029
1.3Projected 2029 index
0.51–2.195% range
±34.3%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.3 | 0.47 | 2.0 |
| 2026 | 1.3 | 0.48 | 2.1 |
| 2027 | 1.3 | 0.49 | 2.1 |
| 2028 | 1.3 | 0.50 | 2.1 |
| 2029 | 1.3 | 0.51 | 2.1 |
Member Species In Wisconsin
| Black Tern | Laridae | -99% |
| Common Tern | Laridae | -86% |
| American Coot | Rallidae | -85% |
| Sora | Rallidae | -85% |
| Herring Gull | Laridae | -83% |
| Pied-billed Grebe | Podicipedidae | -76% |
| Virginia Rail | Rallidae | -65% |
| Common Gallinule | Rallidae | -61% |
| Ring-billed Gull | Laridae | -32% |
| American Bittern | Ardeidae | -31% |
| Forster's Tern | Laridae | -24% |
| Black-crowned Night Heron | Ardeidae | -21% |
| Great Blue Heron | Ardeidae | -10% |
| Least Bittern | Ardeidae | +17% |
| Green Heron | Ardeidae | +18% |
| Common Loon | Gaviidae | +20% |
| Double-crested Cormorant | Phalacrocoracidae | +77% |
| Great Egret | Ardeidae | +194% |
| American White Pelican | Pelecanidae | 22× |
| Sandhill Crane | Gruidae | 35× |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.