BirdAnalyst
Species · North Carolina · BBS 2026 Release · 1966–2025

House Finch Population Trend in North Carolina

All statesGeneralists

House Finch in North Carolina has surged: up 52× on the route-weighted index since 1987.

52×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 →
88Routes 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 North CarolinaNotable 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 North Carolina: up 52× on the route-weighted index since 1987.

House Finch Population Forecast in North Carolina

If the recent trend holds, House Finch in North Carolina is projected to stay roughly flat through 2030, near 8.1 (95% range 4.9–11). A 5-year backtest shows a typical error of ±9%, with 100% of held-out values landing inside the 95% band.

-4%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 →
8.1Projected 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 →
4.9–1195% 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 →
±9%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 North Carolina is projected to stay roughly flat through 2030, near 8.1 (95% range 4.9–11). A 5-year backtest shows a typical error of ±9%, with 100% of held-out values landing inside the 95% band.19832030
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 →
20267.64.311
20277.74.511
20287.84.611
20298.04.711
20308.14.911

House Finch Survey Routes in North Carolina

Routes recording House Finch in North Carolina.
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 →
Myrtle Grove4820251992
Climax3020251994
Jarvisburg2919991992
Sheffield2820251991
Siloam2520252005
Youngsville2420251991
Wilgrove2420251995
Eden2020251987
Jordan1820251983
Mooresville 21820252006
Sawmill1820251990
Durham1720251990
Call1620251991
Old Trap1620242010
Copeland1520251994
Cokesbury1320251996
Cypress Lakes1320252007
Hulls Xroads1220231997
Mooresville1120011989
Biscoe1120251990
Monticello1120251990
Brevard1020251989
Jamesville1020251990
Waco1020191989
Jarvisburg 21020252000

House Finch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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