BirdAnalyst
Species · New Jersey · BBS 2025 Release · 1966–2024

House Finch Population Trend in New Jersey

All statesGeneralists

House Finch in New Jersey has surged: up 68× on the route-weighted index since 1973.

68×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 →
53YearsYears 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 68× 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 rise about 42% by 2029 — from 9.4 in 2024 to a central estimate of 13 (95% range 0.00–32). A 5-year backtest shows a typical error of ±73.7%, with 100% of held-out values landing inside the 95% band.

+42%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 →
13Projected 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 →
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 →
±73.7%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 rise about 42% by 2029 — from 9.4 in 2024 to a central estimate of 13 (95% range 0.00–32). A 5-year backtest shows a typical error of ±73.7%, with 100% of held-out values landing inside the 95% band.19692029
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 →
2025130.0032
2026130.0032
2027130.0032
2028130.0032
2029130.0032

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 →
Pedricktown 23320242013
Hope3019941976
Holmansville2820091975
Dover2820231977
Kemah Lake2720241981
Pedricktown2420121991
New Bedford2220241974
Woodbury Hgt2120241986
Albion1620221988
Del Haven1519911991
Croton 21520242008
Ocean City1420241980
Clarksville1319911978
Bennett Mill 21320242016
Mt Misery1219891984
Sandbrook1120241978
Croton1120071976
Bloomsbury1120241973
Keyport1020221986
Toms River820241979
Robbinsville819791978
Roosevelt720221986
Bennett Mill620001991
Pomona520241983
Cranbury420241987

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 2026-05-22.