BirdAnalyst
Species · Tennessee · BBS 2026 Release · 1966–2025

House Finch Population Trend in Tennessee

All statesGeneralists

House Finch in Tennessee has surged: up 56× on the route-weighted index since 1987.

56×Since 1987TrendPercent 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 →
44Routes 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 →
40YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable House Finch 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 →

long arc increasecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

House Finch has surged in Tennessee: up 56× on the route-weighted index since 1987.

House Finch Population Forecast in Tennessee

If the recent trend holds, House Finch in Tennessee is projected to rise about 17% by 2030 — from 4.5 in 2025 to a central estimate of 5.3 (95% range 2.6–7.9). A 5-year backtest shows a typical error of ±16.3%, with 100% of held-out values landing inside the 95% band.

+17%Change by 2030TrendPercent 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 →
5.3Projected 2030 indexProjected indexThe central forecast of the abundance index if the recent trend continues. A projection of the current trajectory, not a prediction.Full methodology →
2.6–7.995% 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 →
±16.3%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, House Finch in Tennessee is projected to rise about 17% by 2030 — from 4.5 in 2025 to a central estimate of 5.3 (95% range 2.6–7.9). A 5-year backtest shows a typical error of ±16.3%, with 100% of held-out values landing inside the 95% band.19852030
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 →
20265.02.37.6
20275.02.47.7
20285.12.57.8
20295.22.57.9
20305.32.67.9

House Finch Survey Routes in Tennessee

Routes recording House Finch 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 →
Lovell4820191985
Corryton Rd3920191988
Mt Olive3820241987
Campbellsville2520191992
Humboldt1820252000
Big Sandy1620251995
Climer1620041989
Petersburg1420191994
Collinwood1320251995
Indian Mound 2920232005
Pawpaw 2820232013
Glen720251994
Tiptonville620251992
Wrigley620221996
Peytonsville620251994
Cornpone620241991
Moscow520251993
Mansfield520251993
Pond Creek520251993
Oliver Spgs520221987
Jefferson Cty420111990
Allens Brdge420231989
Jones Gap420192001
Silerton320241992
Indian Mound319981996

House Finch Population Trend in Other States

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

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.