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

Cliff Swallow Population Trend in Tennessee

All statesAerial insectivores

Cliff Swallow in Tennessee has surged: up 53× on the route-weighted index since 1968.

53×Since 1968
38Routes In State
58Years

Notable Cliff Swallow Trends in Tennessee

long arc increasecomputed index

Cliff Swallow has surged in Tennessee: up 53× on the route-weighted index since 1968.

Cliff Swallow Population Forecast in Tennessee

If the recent trend holds, Cliff Swallow in Tennessee is projected to fall about 49% by 2029 — from 28 in 2024 to a central estimate of 14 (95% range 7.7–21). A 5-year backtest shows a typical error of ±32.5%, with 40% of held-out values landing inside the 95% band.

-49%Change by 2029
14Projected 2029 index
7.7–2195% range
±32.5%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
2025136.620
2026146.920
2027147.121
2028147.421
2029147.721

Cliff Swallow Survey Routes in Tennessee

Routes recording Cliff Swallow in Tennessee.
Collinwood19220241975
Pawpaw 211420232013
White House11020192008
Silerton10020242022
Jefferson Cty9820111966
Mansfield8020242013
Lewis Forest6020241999
Wrigley5820221994
Moscow5020242023
Big Sandy4720241974
Pond Creek3520241968
Trenton3020232021
Cornpone3020242005
Soddy2619811967
Jones Gap2220192006
Belotes Bend2020181995
Tullahoma1920151994
Humboldt1720242021
Peytonsville1620222021
Trace Lewis1220172013
Campbellsville1120171992
Bradyville820172003
Silver Pt820241991
Allens Brdge820232008
Indian Mound 2820182007

Cliff Swallow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniasouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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