BirdAnalyst
Species · South Dakota · BBS 2025 Release · 1966–2024

House Finch Population Trend in South Dakota

All statesGeneralists

House Finch in South Dakota has declined: down 39% on the route-weighted index since 1997.

-39%Since 1997TrendPercent 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 →
20Routes 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 →
27YearsYears 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 South DakotaNotable 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 South Dakota. See the full index history below.

House Finch Population Forecast in South Dakota

If the recent trend holds, House Finch in South Dakota is projected to fall about 11% by 2029 — from 0.09 in 2024 to a central estimate of 0.08 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±140.7%, with 100% of held-out values landing inside the 95% band.

-11%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 →
0.08Projected 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 →
0.00–0.2995% 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 →
±140.7%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 South Dakota is projected to fall about 11% by 2029 — from 0.09 in 2024 to a central estimate of 0.08 (95% range 0.00–0.29). A 5-year backtest shows a typical error of ±140.7%, with 100% of held-out values landing inside the 95% band.19942029
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 →
20250.090.000.30
20260.090.000.30
20270.090.000.29
20280.090.000.29
20290.080.000.29

House Finch Survey Routes in South Dakota

Routes recording House Finch in South Dakota.
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 →
Howard920161998
Rosebud720072007
Broadland620092000
Volga320211994
Custer320191999
Lennox220091996
Forbes220232022
Owanka220131996
Cedar Pass219961996
Lacreek220062006
Lane 2220132013
Tripp120242024
White Lake120072007
Chamberlain120102010
Winner120052005
Rockyford120062003
Volunteer120142014
Badlands120062004
White River120132013
Turton120242024

House Finch Population Trend in Other States

alabamaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinanorth-dakotaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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