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

House Finch Population Trend in Alabama

All statesGeneralists

House Finch in Alabama has surged: up 47× on the route-weighted index since 1989.

47×Since 1989TrendPercent 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 →
98Routes 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 →
38YearsYears 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 AlabamaNotable 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 Alabama: up 47× on the route-weighted index since 1989.

House Finch Population Forecast in Alabama

If the recent trend holds, House Finch in Alabama is projected to stay roughly flat through 2030, near 5.0 (95% range 3.0–7.0). A 5-year backtest shows a typical error of ±8%, with 100% of held-out values landing inside the 95% band.

-7%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 →
5.0Projected 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 →
3.0–7.095% 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 →
±8%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 Alabama is projected to stay roughly flat through 2030, near 5.0 (95% range 3.0–7.0). A 5-year backtest shows a typical error of ±8%, 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 →
20264.62.66.6
20274.72.76.7
20284.82.86.8
20294.92.96.9
20305.03.07.0

House Finch Survey Routes in Alabama

Routes recording House Finch in Alabama.
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 →
Birmingham5219951985
Newton2620241991
Grangeburg2520241999
Mt. Gilead2420251994
Brundidge2120211991
Bay Minette1920251996
Elberta1620221997
Alabama Pt 21520192004
Eufaula1520241996
St. Elmo1420252001
Smyer Lake1320251990
Billingsley1320251995
Alabama Pt1320031995
Carter Grove1320232003
Greensport1220251994
Swaim1020251991
Maytown1020251992
Warrior Std1020251998
Elamville1020251999
Vina1020231997
Talladega1020251996
Elkmont920251993
St Florian820251992
Mt Olive820251993
Choccolocco820251991

House Finch Population Trend in Other States

arizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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