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

Bewick's Wren In Sierra Madre Occidental

All regionsSierra Madre OccidentalForest birds

Bewick's Wren in Sierra Madre Occidental has fallen sharply: down 62% on the route-weighted index since 1970.

-62%Since 1970
36Routes In Region
56Years

Notable Signals

long arc declinecomputed index

Bewick's Wren has fallen sharply in Sierra Madre Occidental: down 62% on the route-weighted index since 1970.

Forecast

If the recent trend holds, Bewick's Wren in Sierra Madre Occidental is projected to rise about 30% by 2029 — from 5.6 in 2024 to a central estimate of 7.3 (95% range 0.00–21). A 5-year backtest shows a typical error of ±133.5%, with 100% of held-out values landing inside the 95% band.

+30%Change by 2029
7.3Projected 2029 index
0.00–2195% range
±133.5%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
20258.20.0022
20267.90.0021
20277.70.0021
20287.50.0021
20297.30.0021

Routes In Sierra Madre Occidental

Routes recording Bewick's Wren in Sierra Madre Occidental.
DragoonARIZONA292009
PatagoniaARIZONA192024
RuckerARIZONA182009
Peña BlancaARIZONA172024
Forest LakesARIZONA142024
AmadoARIZONA132023
Emory PassNEW-MEXICO112024
RedingtonARIZONA102023
PomereneARIZONA92024
PortalARIZONA92024
Aztec PeakARIZONA71978
SprucedaleARIZONA72022
Mormon LakeARIZONA61974
CutterARIZONA62014
SunizonaARIZONA51992
Sunizona 2ARIZONA52024
Tonto Vill.ARIZONA42021
Carr MtnARIZONA42024
MagdalenaNEW-MEXICO42024
Skull ValleyARIZONA32024
ReserveNEW-MEXICO32019
Vicks PeakNEW-MEXICO32024
BlueARIZONA21990
Bartlett ResARIZONA22024
Happy JackARIZONA22013

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