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

Chihuahuan Raven In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

Chihuahuan Raven in Sierra Madre Occidental has collapsed: down 85% on the route-weighted index since 1970.

-85%Since 1970
14Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Chihuahuan Raven has collapsed in Sierra Madre Occidental: down 85% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Chihuahuan Raven in Sierra Madre Occidental is projected to fall about 100% by 2029 — from 1.1 in 2024 to a central estimate of 0.00 (95% range 0.00–5.8). A 5-year backtest shows a typical error of ±194.4%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–5.895% range
±194.4%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
20250.000.005.8
20260.000.005.8
20270.000.005.8
20280.000.005.8
20290.000.005.8

Routes In Sierra Madre Occidental

Routes recording Chihuahuan Raven in Sierra Madre Occidental.
McnealARIZONA162024
San SimonARIZONA142022
SunizonaARIZONA101997
AmadoARIZONA72023
MagdalenaNEW-MEXICO62014
Peña BlancaARIZONA42010
PatagoniaARIZONA42004
Sunizona 2ARIZONA42024
SahuaritaARIZONA22010
PortalARIZONA22022
DragoonARIZONA22005
RuckerARIZONA22009
Vicks PeakNEW-MEXICO22014
PomereneARIZONA12022

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