Guild · Delaware · BBS 2025 Release · 1966–2024
Aerial Insectivores In Delaware
15 species in this guild. As a group they are +179% since 1968.
Guild Signals
No notable trend signals for aerial insectivores in Delaware. See the full index history below.
Forecast
If the recent trend holds, Aerial insectivores in Delaware is projected to fall about 16% by 2029 — from 12 in 2024 to a central estimate of 9.9 (95% range 8.1–12). A 5-year backtest shows a typical error of ±15%, with 40% of held-out values landing inside the 95% band.
-16%Change by 2029
9.9Projected 2029 index
8.1–1295% range
±15%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 9.4 | 7.6 | 11 |
| 2026 | 9.5 | 7.8 | 11 |
| 2027 | 9.7 | 7.9 | 11 |
| 2028 | 9.8 | 8.0 | 12 |
| 2029 | 9.9 | 8.1 | 12 |
Member Species In Delaware
| Common Nighthawk | Caprimulgidae | -89% |
| Eastern Whip-poor-will | Caprimulgidae | -86% |
| Eastern Phoebe | Tyrannidae | -61% |
| Northern Rough-winged Swallow | Hirundinidae | -60% |
| Chimney Swift | Apodidae | -41% |
| Bank Swallow | Hirundinidae | +10% |
| Chuck-will's-widow | Caprimulgidae | +42% |
| Eastern Kingbird | Tyrannidae | +45% |
| Willow Flycatcher | Tyrannidae | +63% |
| Eastern Wood-Pewee | Tyrannidae | +93% |
| Barn Swallow | Hirundinidae | +96% |
| Great Crested Flycatcher | Tyrannidae | +170% |
| Acadian Flycatcher | Tyrannidae | +208% |
| Tree Swallow | Hirundinidae | +729% |
| Purple Martin | Hirundinidae | +962% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.