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

Lark Sparrow In Sierra Madre Occidental

All regionsSierra Madre OccidentalGrassland birds

Lark Sparrow in Sierra Madre Occidental has edged down: down 12% on the route-weighted index since 1970.

-12%Since 1970
29Routes In Region
56Years

Notable Signals

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

Forecast

If the recent trend holds, Lark Sparrow in Sierra Madre Occidental is projected to stay roughly flat through 2029, near 3.0 (95% range 0.49–5.6). A 5-year backtest shows a typical error of ±48.1%, with 100% of held-out values landing inside the 95% band.

-9%Change by 2029
3.0Projected 2029 index
0.49–5.695% range
±48.1%Backtest error
19682029
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
20253.00.475.6
20263.00.475.6
20273.00.485.6
20283.00.485.6
20293.00.495.6

Routes In Sierra Madre Occidental

Routes recording Lark Sparrow in Sierra Madre Occidental.
Skull ValleyARIZONA222024
Clay SpringARIZONA172024
Forest LakesARIZONA92024
AlpineARIZONA82022
DragoonARIZONA72009
Mormon LakeARIZONA61975
Happy JackARIZONA62024
PatagoniaARIZONA52023
SunizonaARIZONA51997
San SimonARIZONA42001
SahuaritaARIZONA42021
ReserveNEW-MEXICO42023
MagdalenaNEW-MEXICO42024
RedingtonARIZONA32023
FlagstaffARIZONA22022
Peña BlancaARIZONA22005
WilliamsARIZONA22018
CutterARIZONA22014
AmadoARIZONA22022
McnealARIZONA22009
Sunizona 2ARIZONA22016
Vicks PeakNEW-MEXICO22016
PrescottARIZONA12021
PomereneARIZONA12024
MaineARIZONA12024

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