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

Wetland Birds In Pennsylvania

All statesPennsylvania

9 species in this guild. As a group they are +12% since 1968.

Guild Signals

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

Forecast

If the recent trend holds, Wetland birds in Pennsylvania is projected to rise about 13% by 2029 — from 0.25 in 2024 to a central estimate of 0.29 (95% range 0.09–0.48). A 5-year backtest shows a typical error of ±29.4%, with 100% of held-out values landing inside the 95% band.

+13%Change by 2029
0.29Projected 2029 index
0.09–0.4895% range
±29.4%Backtest error
19662029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.280.090.48
20260.280.090.48
20270.280.090.48
20280.290.090.48
20290.290.090.48

Member Species In Pennsylvania

Wetland birds species in Pennsylvania.
American BitternArdeidae-66%
Pied-billed GrebePodicipedidae-60%
Green HeronArdeidae-54%
Black-crowned Night HeronArdeidae-46%
Ring-billed GullLaridae-7%
Great EgretArdeidae-2%
Double-crested CormorantPhalacrocoracidae-1%
Western Cattle-EgretArdeidae+59%
Great Blue HeronArdeidae+343%

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