BirdAnalyst
Species · BCR 26 · BBS 2025 Release · 1966–2024

Double-crested Cormorant In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyWetland birds

Double-crested Cormorant in Mississippi Alluvial Valley has surged: up 981% on the route-weighted index since 1993.

+981%Since 1993
27Routes In Region
31Years

Notable Signals

long arc increasecomputed index

Double-crested Cormorant has surged in Mississippi Alluvial Valley: up 980% on the route-weighted index since 1993.

Forecast

If the recent trend holds, Double-crested Cormorant in Mississippi Alluvial Valley is projected to fall about 38% by 2029 — from 1.1 in 2024 to a central estimate of 0.66 (95% range 0.11–1.2). A 5-year backtest shows a typical error of ±54.8%, with 40% of held-out values landing inside the 95% band.

-38%Change by 2029
0.66Projected 2029 index
0.11–1.295% range
±54.8%Backtest error
19902029
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
20250.600.051.2
20260.610.061.2
20270.630.081.2
20280.650.091.2
20290.660.111.2

Routes In Mississippi Alluvial Valley

Routes recording Double-crested Cormorant in Mississippi Alluvial Valley.
Eagle LakeMISSISSIPPI332024
MoonMISSISSIPPI142019
DundeeMISSISSIPPI102019
Pawpaw 2TENNESSEE102019
EnglandARKANSAS52011
IsolaMISSISSIPPI52021
Tchula 3MISSISSIPPI52023
HughesARKANSAS42018
AtchafalayaLOUISIANA41996
TiptonvilleTENNESSEE32021
BardwellKENTUCKY22003
BelairLOUISIANA22007
Morgan CityLOUISIANA22022
DeventerMISSOURI22021
South BendARKANSAS12015
Bardwell 2KENTUCKY12010
ShawLOUISIANA12009
RamahLOUISIANA12012
FrogmoreLOUISIANA12024
KraemerLOUISIANA12000
Port AllenLOUISIANA12011
River RoadLOUISIANA12024
Tensas NwrLOUISIANA12004
Baton RougeLOUISIANA12021
Delta N.F.MISSISSIPPI12015

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