Guild · Idaho · BBS 2025 Release · 1966–2024
Aerial Insectivores In Idaho
22 species in this guild. As a group they are -40% since 1970.
Guild Signals
guild collapsecomputed index
Aerial insectivores as a group have declined in Idaho, down 40% since 1970.
Forecast
If the recent trend holds, Aerial insectivores in Idaho is projected to fall about 12% by 2029 — from 2.3 in 2024 to a central estimate of 2.0 (95% range 0.00–4.2). A 5-year backtest shows a typical error of ±25.2%, with 100% of held-out values landing inside the 95% band.
-12%Change by 2029
2.0Projected 2029 index
0.00–4.295% range
±25.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 2.3 | 0.10 | 4.4 |
| 2026 | 2.2 | 0.04 | 4.3 |
| 2027 | 2.1 | 0.00 | 4.3 |
| 2028 | 2.1 | 0.00 | 4.2 |
| 2029 | 2.0 | 0.00 | 4.2 |
Member Species In Idaho
| Ash-throated Flycatcher | Tyrannidae | -86% |
| Common Poorwill | Caprimulgidae | -79% |
| Vaux's Swift | Apodidae | -76% |
| Barn Swallow | Hirundinidae | -71% |
| Black Swift | Apodidae | -68% |
| Bank Swallow | Hirundinidae | -63% |
| Eastern Kingbird | Tyrannidae | -62% |
| Violet-green Swallow | Hirundinidae | -32% |
| Northern Rough-winged Swallow | Hirundinidae | -16% |
| White-throated Swift | Apodidae | +2% |
| Cliff Swallow | Hirundinidae | +40% |
| Say's Phoebe | Tyrannidae | +54% |
| Hammond's Flycatcher | Tyrannidae | +61% |
| Dusky Flycatcher | Tyrannidae | +62% |
| Western Wood-Pewee | Tyrannidae | +62% |
| Tree Swallow | Hirundinidae | +68% |
| Olive-sided Flycatcher | Tyrannidae | +76% |
| Willow Flycatcher | Tyrannidae | +112% |
| Western Kingbird | Tyrannidae | +157% |
| Common Nighthawk | Caprimulgidae | +162% |
| Least Flycatcher | Tyrannidae | +170% |
| Gray Flycatcher | Tyrannidae | +355% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.