BirdAnalyst
Species · BCR 28 · BBS 2026 Release · 1966–2025

House Finch In Appalachian Mountains

All regionsAppalachian MountainsGeneralists

House Finch in Appalachian Mountains has surged: up 114× on the route-weighted index since 1971.

114×Since 1971TrendPercent 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 →
343Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
56YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

No notable trend signals for House Finch in Appalachian Mountains. See the full index history below.

House Finch In Appalachian Mountains Population Forecast

If the recent trend holds, House Finch in Appalachian Mountains is projected to rise about 28% by 2030 — from 4.8 in 2025 to a central estimate of 6.2 (95% range 0.53–12). A 5-year backtest shows a typical error of ±50.8%, with 100% of held-out values landing inside the 95% band.

+28%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 →
6.2Projected 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 →
0.53–1295% 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 →
±50.8%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 Appalachian Mountains is projected to rise about 28% by 2030 — from 4.8 in 2025 to a central estimate of 6.2 (95% range 0.53–12). A 5-year backtest shows a typical error of ±50.8%, 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 →
20266.00.3112
20276.00.3612
20286.10.4212
20296.20.4712
20306.20.5312

Routes In Appalachian Mountains

Routes recording House Finch in Appalachian Mountains.
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 →
RydePENNSYLVANIA562005
BirminghamALABAMA521995
WilliamsportMARYLAND522025
MiddletownPENNSYLVANIA482025
LovellTENNESSEE482019
QuakertownPENNSYLVANIA391989
Corryton RdTENNESSEE392019
Mt OliveTENNESSEE382024
MillvillePENNSYLVANIA342025
StoneybreakPENNSYLVANIA322025
HopeNEW-JERSEY301994
DoverNEW-JERSEY282023
Sleepy CreekWEST-VIRGINIA281990
Kemah LakeNEW-JERSEY272024
ScheafferstnPENNSYLVANIA252001
MifflintownPENNSYLVANIA222025
FincastleVIRGINIA222025
Schaefferstown 2PENNSYLVANIA212025
RamseysburgNEW-JERSEY202025
ClearfieldPENNSYLVANIA202025
Drehersville 2PENNSYLVANIA192025
BlacksburgVIRGINIA192025
SmithfieldOHIO172025
PortersvillePENNSYLVANIA171988
Baxter RidgeOHIO162025

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