Guild · Wisconsin · BBS 2025 Release · 1966–2024
Aerial Insectivores In Wisconsin
19 species in this guild. As a group they are -27% since 1968.
Guild Signals
No notable trend signals for aerial insectivores in Wisconsin. See the full index history below.
Forecast
If the recent trend holds, Aerial insectivores in Wisconsin is projected to stay roughly flat through 2029, near 3.0 (95% range 2.1–3.9). A 5-year backtest shows a typical error of ±10.9%, with 100% of held-out values landing inside the 95% band.
+3%Change by 2029
3.0Projected 2029 index
2.1–3.995% range
±10.9%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.2 | 2.2 | 4.1 |
| 2026 | 3.1 | 2.2 | 4.1 |
| 2027 | 3.1 | 2.2 | 4.0 |
| 2028 | 3.1 | 2.1 | 4.0 |
| 2029 | 3.0 | 2.1 | 3.9 |
Member Species In Wisconsin
| Bank Swallow | Hirundinidae | -91% |
| Purple Martin | Hirundinidae | -89% |
| Olive-sided Flycatcher | Tyrannidae | -81% |
| Common Nighthawk | Caprimulgidae | -79% |
| Eastern Whip-poor-will | Caprimulgidae | -56% |
| Chimney Swift | Apodidae | -55% |
| Eastern Kingbird | Tyrannidae | -33% |
| Great Crested Flycatcher | Tyrannidae | -30% |
| Tree Swallow | Hirundinidae | -30% |
| Least Flycatcher | Tyrannidae | -29% |
| Cliff Swallow | Hirundinidae | -21% |
| Northern Rough-winged Swallow | Hirundinidae | -17% |
| Eastern Phoebe | Tyrannidae | +1% |
| Barn Swallow | Hirundinidae | +10% |
| Acadian Flycatcher | Tyrannidae | +43% |
| Eastern Wood-Pewee | Tyrannidae | +61% |
| Alder Flycatcher | Tyrannidae | +77% |
| Yellow-bellied Flycatcher | Tyrannidae | +101% |
| Willow Flycatcher | Tyrannidae | +114% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.