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

Common Grackle In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyGeneralists

Common Grackle in Mississippi Alluvial Valley has collapsed: down 85% on the route-weighted index since 1968.

-85%Since 1968
72Routes In Region
58Years

Notable Signals

long arc declinecomputed index

Common Grackle has collapsed in Mississippi Alluvial Valley: down 85% on the route-weighted index since 1968.

Forecast

If the recent trend holds, Common Grackle in Mississippi Alluvial Valley is projected to fall about 88% by 2029 — from 21 in 2024 to a central estimate of 2.5 (95% range 0.00–41). A 5-year backtest shows a typical error of ±44.5%, with 100% of held-out values landing inside the 95% band.

-88%Change by 2029
2.5Projected 2029 index
0.00–4195% range
±44.5%Backtest error
19662029
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
202510.00.0048
20268.10.0046
20276.30.0045
20284.40.0043
20292.50.0041

Routes In Mississippi Alluvial Valley

Routes recording Common Grackle in Mississippi Alluvial Valley.
Morgan CityLOUISIANA2601986
HaytiMISSOURI1682021
CarlisleLOUISIANA1361988
GibsonLOUISIANA1142019
BerwickLOUISIANA1032018
Morgan CityLOUISIANA1022022
DellARKANSAS832024
WilsonARKANSAS802024
BlodgettMISSOURI752024
LaroseLOUISIANA741992
River RoadLOUISIANA652024
CommerceMISSISSIPPI651993
AugustaARKANSAS632001
WhittonARKANSAS611991
TchulaMISSISSIPPI491975
HarrisburgARKANSAS472019
PawpawTENNESSEE442012
GonzalesLOUISIANA422019
BardwellKENTUCKY382003
DeventerMISSOURI372024
RamahLOUISIANA362024
TiptonvilleTENNESSEE342023
Pawpaw 2TENNESSEE342023
KeystoneLOUISIANA332013
ShawLOUISIANA332024

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