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Species · Tennessee · BBS 2025 Release · 1966–2024

Swainson's Warbler Population Trend in Tennessee

All statesForest birds

Swainson's Warbler in Tennessee has surged: up 24× on the route-weighted index since 1972.

24×Since 1972
16Routes In State
43Years

Notable Swainson's Warbler Trends in Tennessee

long arc increasecomputed index

Swainson's Warbler has surged in Tennessee: up 24× on the route-weighted index since 1972.

Swainson's Warbler Population Forecast in Tennessee

If the recent trend holds, Swainson's Warbler in Tennessee is projected to fall about 41% by 2029 — from 0.59 in 2024 to a central estimate of 0.35 (95% range 0.11–0.59). A 5-year backtest shows a typical error of ±59.6%, with 0% of held-out values landing inside the 95% band.

-41%Change by 2029
0.35Projected 2029 index
0.11–0.5995% range
±59.6%Backtest error
19672029
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
20250.320.080.56
20260.330.090.56
20270.330.090.57
20280.340.100.58
20290.350.110.59

Swainson's Warbler Survey Routes in Tennessee

Routes recording Swainson's Warbler in Tennessee.
Tellico620241995
Smokey Jct420221978
Willis Sprng420231994
Mcfarland319761972
Mansfield220242009
Silerton220241992
Fish Springs220221998
Cornpone220242024
Elk Valley220221975
Tiptonville120131992
Oliver Spgs120182006
Mecca120231999
Whiteville120221967
Harbuck120232023
Humboldt120241970
Cades Cove120192019

Swainson's Warbler Population Trend in Other States

alabamaarkansasfloridageorgiakentuckylouisianamarylandmississippinorth-carolinaoklahomasouth-carolinatexasvirginiawest-virginia

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