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

Warbling Vireo In Sierra Madre Occidental

All regionsSierra Madre OccidentalForest birds

Warbling Vireo in Sierra Madre Occidental has surged: up 230% on the route-weighted index since 1974.

+230%Since 1974
26Routes In Region
52Years

Notable Signals

long arc increasecomputed index

Warbling Vireo has surged in Sierra Madre Occidental: up 230% on the route-weighted index since 1974.

Forecast

If the recent trend holds, Warbling Vireo in Sierra Madre Occidental is projected to rise about 367% by 2029 — from 0.56 in 2024 to a central estimate of 2.6 (95% range 0.49–4.7). A 5-year backtest shows a typical error of ±96.4%, with 100% of held-out values landing inside the 95% band.

+367%Change by 2029
2.6Projected 2029 index
0.49–4.795% range
±96.4%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
20252.60.464.7
20262.60.464.7
20272.60.474.7
20282.60.484.7
20292.60.494.7

Routes In Sierra Madre Occidental

Routes recording Warbling Vireo in Sierra Madre Occidental.
Mt. GrahamARIZONA402023
AlpineARIZONA282023
PrescottARIZONA112022
Aztec PeakARIZONA71978
SprucedaleARIZONA52021
Emory PassNEW-MEXICO52024
FlagstaffARIZONA42022
BlueARIZONA31991
Skull ValleyARIZONA32024
ReserveNEW-MEXICO32023
PatagoniaARIZONA22010
MaineARIZONA21997
Carr MtnARIZONA22019
PortalARIZONA22023
DragoonARIZONA22009
Mormon LakeARIZONA11974
PomereneARIZONA12022
San SimonARIZONA11979
SunizonaARIZONA11974
Tonto Vill.ARIZONA12015
Forest LakesARIZONA12024
PinetopARIZONA12022
RedingtonARIZONA12021
Happy JackARIZONA12024
RuckerARIZONA12006

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