Guild · Pennsylvania · BBS 2025 Release · 1966–2024
Aerial Insectivores In Pennsylvania
17 species in this guild. As a group they are -11% since 1968.
Guild Signals
No notable trend signals for aerial insectivores in Pennsylvania. See the full index history below.
Forecast
If the recent trend holds, Aerial insectivores in Pennsylvania is projected to stay roughly flat through 2029, near 3.3 (95% range 2.6–3.9). A 5-year backtest shows a typical error of ±8.2%, with 100% of held-out values landing inside the 95% band.
+0%Change by 2029
3.3Projected 2029 index
2.6–3.995% range
±8.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 3.3 | 2.7 | 4.0 |
| 2026 | 3.3 | 2.7 | 4.0 |
| 2027 | 3.3 | 2.7 | 4.0 |
| 2028 | 3.3 | 2.6 | 4.0 |
| 2029 | 3.3 | 2.6 | 3.9 |
Member Species In Pennsylvania
| Bank Swallow | Hirundinidae | -85% |
| Common Nighthawk | Caprimulgidae | -73% |
| Purple Martin | Hirundinidae | -58% |
| Least Flycatcher | Tyrannidae | -41% |
| Eastern Whip-poor-will | Caprimulgidae | -40% |
| Great Crested Flycatcher | Tyrannidae | -39% |
| Chimney Swift | Apodidae | -36% |
| Cliff Swallow | Hirundinidae | -36% |
| Barn Swallow | Hirundinidae | -21% |
| Eastern Kingbird | Tyrannidae | +15% |
| Eastern Phoebe | Tyrannidae | +36% |
| Northern Rough-winged Swallow | Hirundinidae | +84% |
| Willow Flycatcher | Tyrannidae | +96% |
| Eastern Wood-Pewee | Tyrannidae | +101% |
| Tree Swallow | Hirundinidae | +198% |
| Acadian Flycatcher | Tyrannidae | +257% |
| Alder Flycatcher | Tyrannidae | +287% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.