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

Neotropic Cormorant In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyWetland birds

Neotropic Cormorant in Mississippi Alluvial Valley has surged: up 231% on the route-weighted index since 2004.

+231%Since 2004
7Routes In Region
19Years

Notable Signals

long arc increasecomputed index

Neotropic Cormorant has surged in Mississippi Alluvial Valley: up 231% on the route-weighted index since 2004.

Forecast

If the recent trend holds, Neotropic Cormorant in Mississippi Alluvial Valley is projected to rise about 96% by 2029 — from 0.46 in 2024 to a central estimate of 0.89 (95% range 0.00–1.8). A 5-year backtest shows a typical error of ±441.8%, with 20% of held-out values landing inside the 95% band.

+96%Change by 2029
0.89Projected 2029 index
0.00–1.895% range
±441.8%Backtest error
19952029
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
20250.800.001.7
20260.820.001.7
20270.840.001.7
20280.870.001.8
20290.890.001.8

Routes In Mississippi Alluvial Valley

Routes recording Neotropic Cormorant in Mississippi Alluvial Valley.
RamahLOUISIANA82024
FrogmoreLOUISIANA72023
River RoadLOUISIANA72024
KeystoneLOUISIANA12013
ShawLOUISIANA12021
BerwickLOUISIANA12010
AtchafalayaLOUISIANA12023

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