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Species · BCR 34 · BBS 2026 Release · 1966–2025

House Finch In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

House Finch in Sierra Madre Occidental has declined: down 46% on the route-weighted index since 1970.

-46%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 →
36Routes 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 Sierra Madre Occidental. See the full index history below.

House Finch In Sierra Madre Occidental Population Forecast

If the recent trend holds, House Finch in Sierra Madre Occidental is projected to rise about 10% by 2030 — from 12 in 2025 to a central estimate of 13 (95% range 1.2–25). A 5-year backtest shows a typical error of ±32.4%, with 100% of held-out values landing inside the 95% band.

+10%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 →
13Projected 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 →
1.2–2595% 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 →
±32.4%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 Sierra Madre Occidental is projected to rise about 10% by 2030 — from 12 in 2025 to a central estimate of 13 (95% range 1.2–25). A 5-year backtest shows a typical error of ±32.4%, 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 →
2026142.126
2027141.925
2028131.625
2029131.425
2030131.225

Routes In Sierra Madre Occidental

Routes recording House Finch in Sierra Madre Occidental.
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 →
CutterARIZONA552014
PrescottARIZONA472025
SahuaritaARIZONA222025
PatagoniaARIZONA212025
McnealARIZONA212025
PomereneARIZONA192025
Forest LakesARIZONA192025
PinetopARIZONA192022
Bartlett ResARIZONA192025
AmadoARIZONA192025
Clay SpringARIZONA192025
PortalARIZONA182025
Tonto Vill.ARIZONA122025
Peña BlancaARIZONA112025
RedingtonARIZONA112025
DragoonARIZONA112009
RuckerARIZONA102009
Aztec PeakARIZONA91978
San SimonARIZONA92024
Carr MtnARIZONA92025
Emory PassNEW-MEXICO92025
WilliamsARIZONA82025
Vicks PeakNEW-MEXICO82025
Sunizona 2ARIZONA72025
SunizonaARIZONA61997

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