BirdAnalyst
Species · BCR 33 · BBS 2026 Release · 1966–2025

House Finch In Sonoran and Mojave Deserts

All regionsSonoran and Mojave DesertsGeneralists

House Finch in Sonoran and Mojave Deserts has declined: down 36% on the route-weighted index since 1970.

-36%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 →
87Routes 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 Finch in Sonoran and Mojave Deserts. See the full index history below.

House Finch In Sonoran and Mojave Deserts Population Forecast

If the recent trend holds, House Finch in Sonoran and Mojave Deserts is projected to stay roughly flat through 2030, near 16 (95% range 5.8–26). A 5-year backtest shows a typical error of ±10.7%, with 100% of held-out values landing inside the 95% band.

+4%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 →
16Projected 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 →
5.8–2695% 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 →
±10.7%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 Sonoran and Mojave Deserts is projected to stay roughly flat through 2030, near 16 (95% range 5.8–26). A 5-year backtest shows a typical error of ±10.7%, 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 →
2026166.326
2027166.226
2028166.026
2029165.926
2030165.826

Routes In Sonoran and Mojave Deserts

Routes recording House Finch in Sonoran and Mojave Deserts.
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 →
Joshua TreeCALIFORNIA1542002
Willow SpgsCALIFORNIA1121981
Calif CityCALIFORNIA1062015
New RiverARIZONA752016
Anza BorregoCALIFORNIA712025
OnyxCALIFORNIA652015
FlorenceARIZONA591988
WildroseCALIFORNIA532022
InyokernCALIFORNIA492024
Joshua Tree 2CALIFORNIA482025
Cactus ForestARIZONA462025
PearblossomCALIFORNIA412025
Casa GrandeARIZONA402023
Organ PipeARIZONA402023
Willow Springs 2CALIFORNIA372025
Ajo 2ARIZONA342022
ArabyARIZONA332023
RivieraARIZONA302025
Kelso ValleyCALIFORNIA302025
NelsonNEVADA282025
WickenburgARIZONA262023
AlamoNEVADA241973
Lucerne ValCALIFORNIA232025
Alamo RiverCALIFORNIA232018
Cutter 2ARIZONA212018

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