BirdAnalyst
Species · BCR 36 · BBS 2025 Release · 1966–2024

Chihuahuan Raven In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsGeneralists

Chihuahuan Raven in Tamaulipan Brushlands has collapsed: down 90% on the route-weighted index since 1969.

-90%Since 1969
20Routes In Region
57Years

Notable Signals

long arc declinecomputed index

Chihuahuan Raven has collapsed in Tamaulipan Brushlands: down 90% on the route-weighted index since 1969.

Forecast

If the recent trend holds, Chihuahuan Raven in Tamaulipan Brushlands is projected to fall about 100% by 2029 — from 0.33 in 2024 to a central estimate of 0.00 (95% range 0.00–7.1). A 5-year backtest shows a typical error of ±27.1%, with 100% of held-out values landing inside the 95% band.

-100%Change by 2029
0.00Projected 2029 index
0.00–7.195% range
±27.1%Backtest error
19672029
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
20250.280.007.4
20260.120.007.2
20270.000.007.1
20280.000.007.1
20290.000.007.1

Routes In Tamaulipan Brushlands

Routes recording Chihuahuan Raven in Tamaulipan Brushlands.
LaredoTEXAS102023
Catarina 2TEXAS92017
CatarinaTEXAS62010
Pedro CreekTEXAS52005
RandadoTEXAS42009
Agua NuevaTEXAS32012
ZapataTEXAS31982
San YgnacioTEXAS31985
RachalTEXAS21969
Mirando CityTEXAS22021
La PryorTEXAS21971
El SauzTEXAS22014
Encinal 2TEXAS22024
Catarina 3TEXAS22024
MillettTEXAS21997
Cavasara Cr.TEXAS22023
EncinalTEXAS12010
El IndioTEXAS12007
GuerraTEXAS12023
SejitaTEXAS12019

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