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

Double-crested Cormorant Population Trend in Kansas

All statesWetland birds

Double-crested Cormorant in Kansas has surged: up 834% on the route-weighted index since 1977.

+834%Since 1977
17Routes In State
36Years

Notable Double-crested Cormorant Trends in Kansas

long arc increasecomputed index

Double-crested Cormorant has surged in Kansas: up 834% on the route-weighted index since 1977.

Double-crested Cormorant Population Forecast in Kansas

If the recent trend holds, Double-crested Cormorant in Kansas is projected to fall about 70% by 2028 — from 0.85 in 2023 to a central estimate of 0.26 (95% range 0.00–0.67). A 5-year backtest shows a typical error of ±93.3%, with 60% of held-out values landing inside the 95% band.

-70%Change by 2028
0.26Projected 2028 index
0.00–0.6795% range
±93.3%Backtest error
19692028
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
20240.250.000.66
20250.250.000.66
20260.250.000.66
20270.250.000.66
20280.260.000.67

Double-crested Cormorant Survey Routes in Kansas

Routes recording Double-crested Cormorant in Kansas.
Albert2220231969
Chapman1719811981
Barclay619981998
Trading Post420162008
Phillipsburg320172001
Coats220022002
Grantville220222022
Rock Creek220182018
Jewell119861986
Galesburg120232014
Logan120121977
Dalton119951995
Lakin119931993
Pittsburg120132006
Solomon120152015
Hays120082008
Severance120162001

Double-crested Cormorant Population Trend in Other States

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

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