BirdAnalyst
Species · BCR 34 · BBS 2025 Release · 1966–2024

Song Sparrow In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

Song Sparrow in Sierra Madre Occidental has increased: up 38% on the route-weighted index since 1984.

+38%Since 1984
10Routes In Region
40Years

Notable Signals

No notable trend signals for Song Sparrow in Sierra Madre Occidental. See the full index history below.

Forecast

If the recent trend holds, Song Sparrow in Sierra Madre Occidental is projected to fall about 42% by 2029 — from 0.28 in 2024 to a central estimate of 0.16 (95% range 0.00–0.41). A 5-year backtest shows a typical error of ±69%, with 100% of held-out values landing inside the 95% band.

-42%Change by 2029
0.16Projected 2029 index
0.00–0.4195% range
±69%Backtest error
19792029
Projection of the recent trend (dashed) with 80/95% bands — a projection, not a prediction. Habitat, climate, and land use are not modeled.
YearProjected index95% low95% high
20250.170.000.41
20260.170.000.41
20270.170.000.41
20280.160.000.41
20290.160.000.41

Routes In Sierra Madre Occidental

Routes recording Song Sparrow in Sierra Madre Occidental.
CutterARIZONA32014
Carr MtnARIZONA32024
BlueARIZONA11987
PomereneARIZONA12024
PatagoniaARIZONA12024
MaineARIZONA12003
Skull ValleyARIZONA12015
Tonto Vill.ARIZONA12019
RedingtonARIZONA12017
SprucedaleARIZONA12007

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22.