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

House Sparrow Population Trend in North Dakota

All statesGeneralists

House Sparrow in North Dakota has declined: down 33% on the route-weighted index since 1969.

-33%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 →
57YearsYears 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 41% by 2029 — from 18 in 2024 to a central estimate of 11 (95% range 0.00–38). A 5-year backtest shows a typical error of ±19.5%, with 100% of held-out values landing inside the 95% band.

-41%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 →
11Projected 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 →
0.00–3895% 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 →
±19.5%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 41% by 2029 — from 18 in 2024 to a central estimate of 11 (95% range 0.00–38). A 5-year backtest shows a typical error of ±19.5%, with 100% of held-out values landing inside the 95% band.19672029
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 →
2025130.0040
2026120.0040
2027120.0039
2028110.0039
2029110.0038

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 →
Dickinson9420241968
Bowman5120241967
Ft Yates4120041968
Horsehead Lk3920241980
Danzig 23620242019
Edgeley3120241980
Wimbledon2720241981
Solen2620242005
Abercrombie 22120172013
Cedar Creek2020221968
Golva2020231979
Bentley1920241988
Braddock1820221988
Douglas Crk1720241982
Abercrombie1620121967
Rolla1520241969
Dunn Center1520241968
Forman1420241968
Lake George1420221967
Montpelier1420241990
Carson1320241988
Walcott1120231967
Cooperstown1120241969
Webster1020241989
Carpio1020231967

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 2026-05-22.