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

Scaled Quail In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

Scaled Quail in Sierra Madre Occidental has declined: down 37% on the route-weighted index since 1970.

-37%Since 1970
12Routes In Region
54Years

Notable Signals

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

Forecast

If the recent trend holds, Scaled Quail in Sierra Madre Occidental is projected to fall about 62% by 2029 — from 2.2 in 2024 to a central estimate of 0.84 (95% range 0.00–5.6). A 5-year backtest shows a typical error of ±52.6%, with 100% of held-out values landing inside the 95% band.

-62%Change by 2029
0.84Projected 2029 index
0.00–5.695% range
±52.6%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
20251.10.005.8
20261.000.005.7
20270.950.005.7
20280.890.005.6
20290.840.005.6

Routes In Sierra Madre Occidental

Routes recording Scaled Quail in Sierra Madre Occidental.
McnealARIZONA222024
DragoonARIZONA162009
SunizonaARIZONA151997
RuckerARIZONA132009
Sunizona 2ARIZONA92024
AmadoARIZONA32023
Vicks PeakNEW-MEXICO32024
PomereneARIZONA22024
San SimonARIZONA22023
SahuaritaARIZONA22024
MagdalenaNEW-MEXICO22024
PortalARIZONA12022

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