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Species · Tennessee · BBS 2025 Release · 1966–2024

American Robin Population Trend in Tennessee

All statesForest birds

American Robin in Tennessee has increased: up 49% on the route-weighted index since 1968.

+49%Since 1968TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
55Routes In StateSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
58YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable American Robin Trends in TennesseeNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for American Robin in Tennessee. See the full index history below.

American Robin Population Forecast in Tennessee

If the recent trend holds, American Robin in Tennessee is projected to rise about 56% by 2029 — from 15 in 2024 to a central estimate of 23 (95% range 13–33). A 5-year backtest shows a typical error of ±81.3%, with 20% of held-out values landing inside the 95% band.

+56%Change by 2029TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
23Projected 2029 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
13–3395% range95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
±81.3%Backtest errorBacktest errorTypical error when we hold out the most recent years, forecast them, and compare to what actually happened. Lower means a more trustworthy projection.Full methodology →
If the recent trend holds, American Robin in Tennessee is projected to rise about 56% by 2029 — from 15 in 2024 to a central estimate of 23 (95% range 13–33). A 5-year backtest shows a typical error of ±81.3%, with 20% of held-out values landing inside the 95% band.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 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →95% low95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →95% high95% rangeThe 95% uncertainty band around the projection at the forecast horizon. The true value should land inside it most of the time.Full methodology →
2025231233
2026231233
2027231333
2028231333
2029231333

American Robin Survey Routes in Tennessee

Routes recording American Robin in Tennessee.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
Climer10920041967
Corryton Rd6920191966
Indian Mound6519981966
Lovell6420191966
Walland5019891966
Allens Brdge4820231966
Jefferson Cty4620111966
Peytonsville4220241966
Collinwood3920241966
Glen3820241966
White House3720191966
Petersburg3720191969
Humboldt3220241966
Jasper3120241967
Belotes Bend2920181966
Pawpaw2820121968
Oliver Spgs2820221966
Tullahoma2720151967
Mt Olive2620241966
Campbellsville2220171966
Fish Springs2020231966
Bradyville1920211966
Smokey Jct1720221966
Indian Mound 21720232004
Union Hill1620241967

American Robin Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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