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

Chimney Swift In Mississippi Alluvial Valley

All regionsMississippi Alluvial ValleyAerial insectivores

Chimney Swift in Mississippi Alluvial Valley has declined: down 35% on the route-weighted index since 1968.

-35%Since 1968
68Routes In Region
58Years

Notable Signals

No notable trend signals for Chimney Swift in Mississippi Alluvial Valley. See the full index history below.

Forecast

If the recent trend holds, Chimney Swift in Mississippi Alluvial Valley is projected to rise about 43% by 2029 — from 4.8 in 2024 to a central estimate of 6.8 (95% range 2.8–11). A 5-year backtest shows a typical error of ±79.4%, with 80% of held-out values landing inside the 95% band.

+43%Change by 2029
6.8Projected 2029 index
2.8–1195% range
±79.4%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
20256.92.911
20266.92.911
20276.92.811
20286.82.811
20296.82.811

Routes In Mississippi Alluvial Valley

Routes recording Chimney Swift in Mississippi Alluvial Valley.
Baton RougeLOUISIANA442024
CarlisleLOUISIANA251988
CommerceMISSISSIPPI221993
WhittonARKANSAS181991
KeystoneLOUISIANA172013
River RoadLOUISIANA172024
Tchula 2MISSISSIPPI171994
MayflowerLOUISIANA112024
TchulaMISSISSIPPI111975
EnglandARKANSAS102024
BrousvilleLOUISIANA102024
Port AllenLOUISIANA82024
GonzalesLOUISIANA72019
AtchafalayaLOUISIANA72024
Tchula 3MISSISSIPPI72024
DellARKANSAS62010
Morgan CityLOUISIANA61986
RoselandLOUISIANA62024
GibsonLOUISIANA62019
FrogmoreLOUISIANA62024
BerwickLOUISIANA62018
Morgan CityLOUISIANA62022
Pawpaw 2TENNESSEE62022
EudoraARKANSAS52010
SaffellARKANSAS52019

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