BirdAnalyst
Species · North Dakota · BBS 2026 Release · 1966–2025

House Sparrow Population Trend in North Dakota

All statesGeneralists

House Sparrow in North Dakota has declined: down 37% on the route-weighted index since 1969.

-37%Since 1969TrendPercent 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 →
50Routes 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 →
58YearsYears 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 Sparrow Trends in North 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 Sparrow in North Dakota. See the full index history below.

House Sparrow Population Forecast in North Dakota

If the recent trend holds, House Sparrow in North Dakota is projected to fall about 14% by 2030 — from 12 in 2025 to a central estimate of 10 (95% range 0.00–37). A 5-year backtest shows a typical error of ±14.1%, with 100% of held-out values landing inside the 95% band.

-14%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 →
10Projected 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 →
0.00–3795% 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 →
±14.1%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 Sparrow in North Dakota is projected to fall about 14% by 2030 — from 12 in 2025 to a central estimate of 10 (95% range 0.00–37). A 5-year backtest shows a typical error of ±14.1%, with 100% of held-out values landing inside the 95% band.19672030
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 →
2026120.0039
2027120.0039
2028110.0038
2029110.0038
2030100.0037

House Sparrow Survey Routes in North Dakota

Routes recording House Sparrow in North 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 →
Dickinson6720251968
Ft Yates4120041968
Bowman3920251967
Dunn Center2720251968
Solen2620252005
Braddock2420231988
Danzig 22120252019
Abercrombie 22120172013
Cedar Creek2020221968
Bentley1920241988
Golva1820251979
Douglas Crk1720241982
Abercrombie1620121967
Edgeley1520251980
Wimbledon1520251981
Rolla1520241969
Denbigh1520251968
Montpelier1320251990
Walcott1120231967
Webster1020241989
Carpio1020231967
Loraine1020191982
Zap1020241967
Sheyenne Lk1020251980
Gorham820251968

House Sparrow Population Trend in Other States

alabamaalaskaarizonaarkansascaliforniacoloradoconnecticutdelawarefloridageorgiaidahoillinoisindianaiowakansaskentuckylouisianamainemarylandmassachusettsmichiganminnesotamississippimissourimontananebraskanevadanew-hampshirenew-jerseynew-mexiconew-yorknorth-carolinaohiooklahomaoregonpennsylvaniarhode-islandsouth-carolinasouth-dakotatennesseetexasutahvermontvirginiawashingtonwest-virginiawisconsinwyoming

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