Guild · New Hampshire · BBS 2025 Release · 1966–2024
Aerial Insectivores In New Hampshire
18 species in this guild. As a group they are -54% since 1968.
Guild Signals
guild collapsecomputed index
Aerial insectivores as a group have fallen sharply in New Hampshire, down 54% since 1968.
Forecast
If the recent trend holds, Aerial insectivores in New Hampshire is projected to fall about 33% by 2029 — from 2.3 in 2024 to a central estimate of 1.5 (95% range 0.59–2.5). A 5-year backtest shows a typical error of ±20.2%, with 100% of held-out values landing inside the 95% band.
-33%Change by 2029
1.5Projected 2029 index
0.59–2.595% range
±20.2%Backtest error
| Year | Projected index | 95% low | 95% high |
|---|---|---|---|
| 2025 | 1.8 | 0.85 | 2.7 |
| 2026 | 1.7 | 0.79 | 2.7 |
| 2027 | 1.7 | 0.72 | 2.6 |
| 2028 | 1.6 | 0.66 | 2.5 |
| 2029 | 1.5 | 0.59 | 2.5 |
Member Species In New Hampshire
| Bank Swallow | Hirundinidae | -97% |
| Cliff Swallow | Hirundinidae | -93% |
| Olive-sided Flycatcher | Tyrannidae | -90% |
| Yellow-bellied Flycatcher | Tyrannidae | -82% |
| Eastern Kingbird | Tyrannidae | -79% |
| Least Flycatcher | Tyrannidae | -79% |
| Barn Swallow | Hirundinidae | -77% |
| Northern Rough-winged Swallow | Hirundinidae | -76% |
| Tree Swallow | Hirundinidae | -69% |
| Chimney Swift | Apodidae | -62% |
| Common Nighthawk | Caprimulgidae | -58% |
| Purple Martin | Hirundinidae | -57% |
| Eastern Whip-poor-will | Caprimulgidae | -53% |
| Eastern Wood-Pewee | Tyrannidae | +4% |
| Great Crested Flycatcher | Tyrannidae | +4% |
| Alder Flycatcher | Tyrannidae | +13% |
| Eastern Phoebe | Tyrannidae | +30% |
| Willow Flycatcher | Tyrannidae | +205% |
Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.