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

Double-crested Cormorant Population Trend in Tennessee

All statesWetland birds

Double-crested Cormorant in Tennessee has surged: up 431% on the route-weighted index since 1997.

+431%Since 1997
19Routes In State
26Years

Notable Double-crested Cormorant Trends in Tennessee

long arc increasecomputed index

Double-crested Cormorant has surged in Tennessee: up 431% on the route-weighted index since 1997.

Double-crested Cormorant Population Forecast in Tennessee

If the recent trend holds, Double-crested Cormorant in Tennessee is projected to fall about 11% by 2029 — from 0.82 in 2024 to a central estimate of 0.72 (95% range 0.14–1.3). A 5-year backtest shows a typical error of ±89.8%, with 40% of held-out values landing inside the 95% band.

-11%Change by 2029
0.72Projected 2029 index
0.14–1.395% range
±89.8%Backtest error
19912029
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
20250.640.051.2
20260.660.081.2
20270.680.101.3
20280.700.121.3
20290.720.141.3

Double-crested Cormorant Survey Routes in Tennessee

Routes recording Double-crested Cormorant in Tennessee.
Pawpaw 21020192013
Big Sandy820242013
Peytonsville720242024
Tiptonville320211991
Brownsville320152015
Signal Mtn220241997
Tullahoma220152015
Pawpaw120111995
Silerton120142014
Humboldt120222008
Pond Creek120012001
Lewis Forest120242024
Belotes Bend120161999
Jasper120182018
Lovell119981998
Corryton Rd120192019
Jefferson Cty120062006
Mt Olive120172010
Allens Brdge120222022

Double-crested Cormorant Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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