Guild
Wetland Birds
84 species tracked. As a group, wetland birds are -58%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 58% since 1968.
Wetland Birds Population Forecast
If the recent trend holds, Wetland birds as a group is projected to fall about 24% by 2029 — from 0.79 in 2024 to a central estimate of 0.60 (95% range 0.41–0.79). A 5-year backtest shows a typical error of ±13.7%, with 100% of held-out values landing inside the 95% band.
0.60Projected 2029 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 | -92% | 10 |
| Arizona | -89% | 16 |
| South Carolina | -82% | 21 |
| Ohio | -78% | 11 |
| Indiana | -76% | 13 |
| Idaho | -75% | 26 |
| Colorado | -74% | 23 |
| Virginia | -74% | 21 |
| West Virginia | -71% | 4 |
| Georgia | -70% | 22 |
| Rhode Island | -69% | 8 |
| Pennsylvania | -68% | 12 |
| Vermont | -64% | 11 |
| Maine | -64% | 16 |
| Massachusetts | -61% | 16 |
| Wyoming | -61% | 20 |
| Michigan | -58% | 20 |
| New York | -56% | 23 |
| Florida | -55% | 39 |
| Illinois | -53% | 16 |
| New Hampshire | -52% | 12 |
| Texas | -52% | 42 |
| Mississippi | -50% | 17 |
| Missouri | -50% | 12 |
| Alabama | -49% | 33 |
| Nebraska | -48% | 21 |
| California | -46% | 39 |
| Maryland | -45% | 26 |
| Tennessee | -44% | 11 |
| Kentucky | -39% | 9 |
| South Dakota | -38% | 24 |
| New Mexico | -37% | 18 |
| Oregon | -37% | 31 |
| Minnesota | -37% | 27 |
| North Carolina | -32% | 31 |
| Iowa | -31% | 12 |
| Wisconsin | -29% | 24 |
| Louisiana | -26% | 36 |
| Washington | -19% | 27 |
| Arkansas | -18% | 15 |
| Nevada | -17% | 22 |
| Kansas | -9% | 22 |
| New Jersey | +16% | 24 |
| North Dakota | +31% | 28 |
| Utah | +37% | 27 |
| Montana | +40% | 22 |
| Delaware | +48% | 23 |
| Oklahoma | +64% | 16 |