BirdAnalyst
Species · BCR 22 · BBS 2025 Release · 1966–2024

House Finch In Eastern Tallgrass Prairie

All regionsEastern Tallgrass PrairieGeneralists

House Finch in Eastern Tallgrass Prairie has surged: up 174× on the route-weighted index since 1984.

174×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 →
259Routes 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 →
42YearsYears 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 →

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 Eastern Tallgrass Prairie: up 174× on the route-weighted index since 1984.

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 2029, near 4.8 (95% range 1.0–8.5). A 5-year backtest shows a typical error of ±13.6%, with 100% of held-out values landing inside the 95% band.

+3%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 →
4.8Projected 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 →
1.0–8.595% 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 →
±13.6%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 2029, near 4.8 (95% range 1.0–8.5). A 5-year backtest shows a typical error of ±13.6%, with 100% of held-out values landing inside the 95% band.19822029
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 →
20254.60.868.3
20264.60.908.4
20274.70.948.4
20284.70.988.4
20294.81.08.5

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 →
WayneILLINOIS412024
PlainfieldINDIANA361999
WilmingtonOHIO361996
DunlapOHIO301988
BrooklynIOWA292018
NewportOHIO291994
RaymondWISCONSIN292024
TroyOHIO271996
AshleyOHIO262018
BrookvilleINDIANA252024
ItascaILLINOIS242024
MaplewoodINDIANA232021
Marion 2OHIO232024
Sioux CityIOWA222024
New DoverOHIO222022
AndersonINDIANA212024
MarionOHIO212023
Red RockIOWA202024
Portage 2INDIANA172024
TiptonINDIANA161992
MoselleMISSOURI162024
NorwalkOHIO152024
EnonOHIO152024
SheffieldILLINOIS142024
New LenoxILLINOIS142019

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.