BirdAnalyst
Species · BCR 22 · BBS 2026 Release · 1966–2025

House Finch In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGeneralists

House Finch in Eastern Tallgrass Prairie has surged: up 191× on the route-weighted index since 1984.

191×Since 1984TrendPercent 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 →
260Routes 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 →
43YearsYears 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 Eastern Tallgrass Prairie. See the full index history below.

House Finch In Eastern Tallgrass Prairie Population Forecast

If the recent trend holds, House Finch in Eastern Tallgrass Prairie is projected to stay roughly flat through 2030, near 4.9 (95% range 1.2–8.6). A 5-year backtest shows a typical error of ±6.8%, with 100% of held-out values landing inside the 95% band.

-6%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 →
4.9Projected 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 →
1.2–8.695% 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 →
±6.8%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 Eastern Tallgrass Prairie is projected to stay roughly flat through 2030, near 4.9 (95% range 1.2–8.6). A 5-year backtest shows a typical error of ±6.8%, with 100% of held-out values landing inside the 95% band.19822030
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 →
20264.71.008.4
20274.71.08.4
20284.81.18.5
20294.81.18.5
20304.91.28.6

Routes In Eastern Tallgrass Prairie

Routes recording House Finch in Eastern Tallgrass Prairie.
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 →
HarristownILLINOIS622025
WayneILLINOIS422025
PlainfieldINDIANA361999
WilmingtonOHIO361996
House SpringsMISSOURI302025
DunlapOHIO301988
NewportOHIO291994
TroyOHIO271996
AshleyOHIO262018
Portage 2INDIANA252025
MaplewoodINDIANA232021
New DoverOHIO222022
MarionOHIO212023
RaymondWISCONSIN212025
MoselleMISSOURI202025
ItascaILLINOIS192025
CaledoniaILLINOIS192025
Lake SummersetILLINOIS192025
BrookvilleINDIANA192025
Witts StationINDIANA192025
BartonvilleILLINOIS182025
MarshallILLINOIS182025
JanesvilleILLINOIS172025
SenecaILLINOIS162025
TiptonINDIANA161992

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