BirdAnalyst
Species · Alabama · BBS 2025 Release · 1966–2024

Chimney Swift Population Trend in Alabama

All statesAerial insectivores

Chimney Swift in Alabama has fallen sharply: down 70% on the route-weighted index since 1968.

-70%Since 1968
109Routes In State
58Years

Notable Chimney Swift Trends in Alabama

long arc declinecomputed index

Chimney Swift has fallen sharply in Alabama: down 70% on the route-weighted index since 1968.

Chimney Swift Population Forecast in Alabama

If the recent trend holds, Chimney Swift in Alabama is projected to fall about 42% by 2029 — from 5.8 in 2024 to a central estimate of 3.4 (95% range 0.00–7.9). A 5-year backtest shows a typical error of ±14.5%, with 100% of held-out values landing inside the 95% band.

-42%Change by 2029
3.4Projected 2029 index
0.00–7.995% range
±14.5%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
20254.60.029.1
20264.30.008.8
20274.00.008.5
20283.70.008.2
20293.40.007.9

Chimney Swift Survey Routes in Alabama

Routes recording Chimney Swift in Alabama.
Birmingham14519951969
Dearmanville4519831966
Howard4520241966
Riderwood2620231966
Summitt2319811966
St Florian1920241967
Dawson1919981966
Stevenson1920241996
Greensport1420241966
Brantley1320241966
Alabama Pt1220031966
Foley1219841966
Rock Chapel1220241995
Millerville1120241966
Wedgeworth1120241979
Valhermoso Spgs1020101966
Wallsboro1020211966
Dauphin Is1019901966
Alabama Pt 21020172004
Hillsboro919961966
Warrior Std920241966
Castleberry920241966
Liberty City920111979
Swaim820241966
Newton820241966

Chimney Swift Population Trend in Other States

arkansascoloradoconnecticutdelawarefloridageorgiaillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanew-hampshirenew-jerseynew-yorknorth-carolinanorth-dakotaohiooklahomapennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasvermontvirginiawest-virginiawisconsinwyoming

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