BirdAnalyst
Guild · Rhode Island · BBS 2026 Release · 1966–2025

Wetland Birds In Rhode Island

All statesRhode Island

8 species in this guild. As a group they are -55%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 Rhode Island, down 55% since 1968.

Wetland Birds In Rhode Island Population Forecast

If the recent trend holds, Wetland birds in Rhode Island is projected to rise about 13% by 2030 — from 15 in 2025 to a central estimate of 16 (95% range 0.00–62). A 5-year backtest shows a typical error of ±240.7%, with 100% of held-out values landing inside the 95% band.

+13%Change by 2030TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
16Projected 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 →
0.00–6295% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±240.7%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, Wetland birds in Rhode Island is projected to rise about 13% by 2030 — from 15 in 2025 to a central estimate of 16 (95% range 0.00–62). A 5-year backtest shows a typical error of ±240.7%, with 100% of held-out values landing inside the 95% band.19662030
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
2026170.0063
2027170.0062
2028170.0062
2029170.0062
2030160.0062

Member Species In Rhode Island

Wetland birds species in Rhode Island.
TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
Herring GullLaridae-98%
Green HeronArdeidae-55%
Red-winged BlackbirdIcteridae-53%
Swamp SparrowPasserellidae-40%
Black-crowned Night HeronArdeidae-8%
Great Blue HeronArdeidae-6%
Great Black-backed GullLaridae+179%
Double-crested CormorantPhalacrocoracidae+179%

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.