Guild
Wetland Birds
84 species tracked. As a group, wetland birds are -57%Guild trendA mean-index aggregate across the species in this group — the structural direction of the guild, with individual-species noise smoothed out.Full methodology → since 1968.
Guild SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →
guild collapsecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →
Wetland birds as a group have fallen sharply in surveyed states, down 57% since 1968.
Wetland Birds Population Forecast
If the recent trend holds, Wetland birds as a group is projected to fall about 27% by 2030 — from 0.81 in 2025 to a central estimate of 0.59 (95% range 0.40–0.78). A 5-year backtest shows a typical error of ±16.7%, with 100% of held-out values landing inside the 95% band.
0.59Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
Wetland Birds By State
| Guild trendA mean-index aggregate across the species in this group — the structural direction of the guild, with individual-species noise smoothed out.Full methodology → | ||
|---|---|---|
| Alaska | -96% | 21 |
| Connecticut | -90% | 10 |
| Arizona | -89% | 16 |
| Idaho | -83% | 26 |
| South Carolina | -82% | 21 |
| Ohio | -79% | 11 |
| Indiana | -78% | 14 |
| Colorado | -75% | 23 |
| Virginia | -75% | 21 |
| West Virginia | -71% | 4 |
| Georgia | -70% | 22 |
| Pennsylvania | -67% | 12 |
| Maine | -66% | 16 |
| Massachusetts | -65% | 16 |
| Vermont | -61% | 11 |
| Wyoming | -60% | 20 |
| Michigan | -55% | 20 |
| Rhode Island | -55% | 8 |
| Texas | -55% | 42 |
| Florida | -54% | 39 |
| Nebraska | -52% | 21 |
| Illinois | -51% | 16 |
| Missouri | -51% | 12 |
| New Hampshire | -51% | 12 |
| New York | -48% | 23 |
| California | -42% | 39 |
| Maryland | -42% | 26 |
| Mississippi | -40% | 17 |
| Alabama | -40% | 33 |
| Oregon | -38% | 31 |
| Iowa | -36% | 13 |
| Kentucky | -35% | 9 |
| Tennessee | -34% | 11 |
| Minnesota | -33% | 27 |
| New Mexico | -31% | 18 |
| South Dakota | -31% | 24 |
| North Carolina | -30% | 31 |
| Nevada | -30% | 23 |
| Wisconsin | -27% | 24 |
| Arkansas | -25% | 15 |
| Louisiana | -25% | 36 |
| Washington | -15% | 27 |
| Kansas | -8% | 22 |
| New Jersey | -3% | 24 |
| Delaware | +35% | 23 |
| Utah | +36% | 27 |
| North Dakota | +41% | 28 |
| Montana | +45% | 22 |
| Oklahoma | +59% | 16 |