BirdAnalyst
Species · New Jersey · BBS 2026 Release · 1966–2025

House Finch Population Trend in New Jersey

All statesGeneralists

House Finch in New Jersey has surged: up 77× on the route-weighted index since 1973.

77×Since 1973TrendPercent 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 →
39Routes 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 →
54YearsYears 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 New JerseyNotable 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 New Jersey: up 77× on the route-weighted index since 1973.

House Finch Population Forecast in New Jersey

If the recent trend holds, House Finch in New Jersey is projected to stay roughly flat through 2030, near 13 (95% range 0.00–32). A 5-year backtest shows a typical error of ±56.8%, with 100% of held-out values landing inside the 95% band.

+9%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 →
13Projected 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 →
0.00–3295% 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 →
±56.8%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 New Jersey is projected to stay roughly flat through 2030, near 13 (95% range 0.00–32). A 5-year backtest shows a typical error of ±56.8%, with 100% of held-out values landing inside the 95% band.19692030
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 →
2026130.0032
2027130.0032
2028130.0032
2029130.0032
2030130.0032

House Finch Survey Routes in New Jersey

Routes recording House Finch in New Jersey.
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 →
Woodbury Hgt3220251986
Pedricktown 23120252013
Hope3019941976
Holmansville2820091975
Dover2820231977
Kemah Lake2720241981
Croton 22520252008
Sandbrook2420251978
Pedricktown2420121991
New Bedford2220241974
Ramseysburg2020251995
Albion1620221988
Del Haven1519911991
Clarksville1319911978
Ocean City1320251980
Bennett Mill 21320252016
Mt Misery1219891984
Croton1120071976
Bloomsbury1120251973
High Point1020251978
Keyport1020221986
Cranbury1020251987
Pomona1020251983
Winslow920251989
Toms River820241979

House Finch Population Trend in Other States

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

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