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

Anhinga In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyGeneralists

Anhinga in Mississippi Alluvial Valley has surged: up 682% on the route-weighted index since 1974.

+682%Since 1974
35Routes In Region
48Years

Notable Signals

long arc increasecomputed index

Anhinga has surged in Mississippi Alluvial Valley: up 682% on the route-weighted index since 1974.

Forecast

If the recent trend holds, Anhinga in Mississippi Alluvial Valley is projected to rise about 56% by 2029 — from 1.1 in 2024 to a central estimate of 1.7 (95% range 0.79–2.6). A 5-year backtest shows a typical error of ±85.1%, with 60% of held-out values landing inside the 95% band.

+56%Change by 2029
1.7Projected 2029 index
0.79–2.695% range
±85.1%Backtest error
19692029
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
20251.60.682.5
20261.60.712.5
20271.60.742.6
20281.70.762.6
20291.70.792.6

Routes In Mississippi Alluvial Valley

Routes recording Anhinga in Mississippi Alluvial Valley.
RamahLOUISIANA152024
BerwickLOUISIANA152018
Tchula 2MISSISSIPPI61994
FreetownLOUISIANA52009
FrogmoreLOUISIANA52023
Eagle LakeMISSISSIPPI52024
Tchula 3MISSISSIPPI42024
BrousvilleLOUISIANA32010
Port AllenLOUISIANA32024
EudoraARKANSAS21997
ShawLOUISIANA22024
RayvilleLOUISIANA21999
River RoadLOUISIANA22024
AtchafalayaLOUISIANA22024
Baton RougeLOUISIANA22023
DundeeMISSISSIPPI22010
Delta N.F.MISSISSIPPI22016
HughesARKANSAS12010
South BendARKANSAS12023
GillettARKANSAS12024
Morgan CityLOUISIANA11986
RoselandLOUISIANA11986
KeystoneLOUISIANA12003
MayflowerLOUISIANA12024
GibsonLOUISIANA12015

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