BirdAnalyst
Guild · Missouri · BBS 2025 Release · 1966–2024

Wetland Birds In Missouri

All statesMissouri

9 species in this guild. As a group they are -68%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 1969.

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 Missouri, down 68% since 1969.

Wetland Birds In Missouri Population Forecast

If the recent trend holds, Wetland birds in Missouri is projected to stay roughly flat through 2029, near 0.37 (95% range 0.00–0.91). A 5-year backtest shows a typical error of ±22.5%, with 100% of held-out values landing inside the 95% band.

+6%Change by 2029TrendPercent 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 →
0.37Projected 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 →
0.00–0.9195% 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 →
±22.5%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 Missouri is projected to stay roughly flat through 2029, near 0.37 (95% range 0.00–0.91). A 5-year backtest shows a typical error of ±22.5%, with 100% of held-out values landing inside the 95% band.19672029
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 →
20250.400.000.95
20260.390.000.94
20270.380.000.93
20280.380.000.92
20290.370.000.91

Member Species In Missouri

Wetland birds species in Missouri.
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 →
Little Blue HeronArdeidae-99%
Black-crowned Night HeronArdeidae-74%
Yellow-crowned Night HeronArdeidae-64%
Western Cattle-EgretArdeidae-53%
Green HeronArdeidae-50%
Snowy EgretArdeidae+4%
Double-crested CormorantPhalacrocoracidae+11%
Great EgretArdeidae+60%
Great Blue HeronArdeidae+188%

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.