Guild · Washington · BBS 2025 Release · 1966–2024
Aerial Insectivores In Washington
22 species in this guild. As a group they are -43% since 1970.
Guild Signals
guild collapsecomputed index
Aerial insectivores as a group have declined in Washington, down 43% since 1970.
Forecast
If the recent trend holds, Aerial insectivores in Washington is projected to stay roughly flat through 2029, near 4.1 (95% range 2.7–5.5). A 5-year backtest shows a typical error of ±13%, with 100% of held-out values landing inside the 95% band.
+4%Change by 2029
4.1Projected 2029 index
2.7–5.595% range
±13%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 4.2 | 2.8 | 5.7 |
| 2026 | 4.2 | 2.8 | 5.7 |
| 2027 | 4.2 | 2.7 | 5.6 |
| 2028 | 4.1 | 2.7 | 5.6 |
| 2029 | 4.1 | 2.7 | 5.5 |
Member Species In Washington
| Black Swift | Apodidae | -92% |
| Common Poorwill | Caprimulgidae | -72% |
| Bank Swallow | Hirundinidae | -69% |
| Willow Flycatcher | Tyrannidae | -65% |
| Olive-sided Flycatcher | Tyrannidae | -59% |
| Eastern Kingbird | Tyrannidae | -45% |
| Barn Swallow | Hirundinidae | -37% |
| Least Flycatcher | Tyrannidae | -37% |
| Cliff Swallow | Hirundinidae | -28% |
| Western Kingbird | Tyrannidae | -20% |
| Violet-green Swallow | Hirundinidae | -16% |
| Northern Rough-winged Swallow | Hirundinidae | -9% |
| Western Wood-Pewee | Tyrannidae | -7% |
| Tree Swallow | Hirundinidae | -7% |
| Vaux's Swift | Apodidae | +53% |
| White-throated Swift | Apodidae | +62% |
| Purple Martin | Hirundinidae | +74% |
| Common Nighthawk | Caprimulgidae | +101% |
| Hammond's Flycatcher | Tyrannidae | +152% |
| Say's Phoebe | Tyrannidae | +168% |
| Dusky Flycatcher | Tyrannidae | +216% |
| Gray Flycatcher | Tyrannidae | +451% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.