BirdAnalyst
Species · BCR 9 · BBS 2026 Release · 1966–2025

House Sparrow In Great Basin

All regionsGreat BasinGeneralists

House Sparrow in Great Basin has held roughly steady: down 2% on the route-weighted index since 1970.

-2%Since 1970TrendPercent 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 →
176Routes 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 →
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 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 Sparrow in Great Basin. See the full index history below.

House Sparrow In Great Basin Population Forecast

If the recent trend holds, House Sparrow in Great Basin is projected to fall about 41% by 2030 — from 24 in 2025 to a central estimate of 14 (95% range 3.2–25). A 5-year backtest shows a typical error of ±24.7%, with 100% of held-out values landing inside the 95% band.

-41%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 →
14Projected 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 →
3.2–2595% 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 →
±24.7%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 Sparrow in Great Basin is projected to fall about 41% by 2030 — from 24 in 2025 to a central estimate of 14 (95% range 3.2–25). A 5-year backtest shows a typical error of ±24.7%, with 100% of held-out values landing inside the 95% band.19682030
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 →
2026154.326
2027154.026
2028153.725
2029143.525
2030143.225

Routes In Great Basin

Routes recording House Sparrow in Great Basin.
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 →
Mud LakeIDAHO8862025
RirieIDAHO3332025
FallonNEVADA3062025
PocatelloIDAHO2162019
GoshenUTAH2062025
Blacks CreekIDAHO2002017
MerrillOREGON1632022
Cedar HillIDAHO1622024
Scootney ReservoirWASHINGTON1462025
Columbia NwrWASHINGTON1302022
OthelloWASHINGTON1221991
DeltaUTAH1192025
Carson RiverNEVADA1132002
SelahWASHINGTON1132025
Moses LakeWASHINGTON1092022
DorrisCALIFORNIA1052019
PrestonIDAHO972023
Glenns FerryIDAHO881986
MesaWASHINGTON732008
HawthorneNEVADA702001
UmatillaOREGON682025
WapatoWASHINGTON642022
Ewan 2WASHINGTON642025
MaldenWASHINGTON622025
QuincyWASHINGTON612024

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