Guild · Iowa · BBS 2025 Release · 1966–2024

Wetland Birds In Iowa

7 species in this guild. As a group they are +94% since 1969.

Guild Signals

No notable trend signals for wetland birds in Iowa. See the full index history below.

Forecast

If the recent trend holds, Wetland birds in Iowa is projected to rise about 144% by 2029 — from 0.19 in 2024 to a central estimate of 0.47 (95% range 0.18–0.76). A 5-year backtest shows a typical error of ±105.8%, with 20% of held-out values landing inside the 95% band.

+144%Change by 2029

0.47Projected 2029 index

0.18–0.7695% range

±105.8%Backtest error

Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.

Year	Projected index	95% low	95% high
2025	0.45	0.15	0.74
2026	0.45	0.16	0.75
2027	0.46	0.17	0.75
2028	0.47	0.17	0.76
2029	0.47	0.18	0.76

Member Species In Iowa

Wetland birds species in Iowa.

American Coot	Rallidae	-77%
Double-crested Cormorant	Phalacrocoracidae	-75%
Green Heron	Ardeidae	-14%
Sora	Rallidae	-4%
Pied-billed Grebe	Podicipedidae	+17%
Black Tern	Laridae	+172%
Great Blue Heron	Ardeidae	+515%

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