BirdAnalyst
Species · Alabama · BBS 2025 Release · 1966–2024

Double-crested Cormorant Population Trend in Alabama

All statesWetland birds

Double-crested Cormorant in Alabama has surged: up 38× on the route-weighted index since 1983.

38×Since 1983
31Routes In State
34Years

Notable Double-crested Cormorant Trends in Alabama

long arc increasecomputed index

Double-crested Cormorant has surged in Alabama: up 38× on the route-weighted index since 1983.

Double-crested Cormorant Population Forecast in Alabama

If the recent trend holds, Double-crested Cormorant in Alabama is projected to rise about 218% by 2029 — from 0.32 in 2024 to a central estimate of 1.0 (95% range 0.00–2.4). A 5-year backtest shows a typical error of ±513.3%, with 100% of held-out values landing inside the 95% band.

+218%Change by 2029
1.0Projected 2029 index
0.00–2.495% range
±513.3%Backtest error
19772029
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
20250.910.002.3
20260.930.002.3
20270.960.002.4
20280.980.002.4
20291.00.002.4

Double-crested Cormorant Survey Routes in Alabama

Routes recording Double-crested Cormorant in Alabama.
Wheeler Dam10220232001
Elkmont3620142014
Castleberry2320082008
Guntersville1520242001
Wedgeworth620022001
Rock Chapel520022002
Dauphin Is 2420182008
St Florian319991999
Valhermoso Spgs320101996
Pine Grove320241983
Greensboro320122012
Greensport220192000
Billingsley220082008
Alabama Pt219991977
Calebee220081997
Triana220112002
Dauphin Is 3220212021
Alabama Pt 2120152004
Kymulga120222022
Grangeburg119951995
Brundidge120042004
Dauphin Is119811981
Grove Hill119901990
Fairview119951995
Odenville120212021

Double-crested Cormorant Population Trend in Other States

alaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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