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

Downy Woodpecker In Sierra Madre Occidental

All regionsSierra Madre OccidentalForest birds

Downy Woodpecker in Sierra Madre Occidental has collapsed: down 84% on the route-weighted index since 1975.

-84%Since 1975TrendPercent change in the route-weighted abundance index between a smoothed baseline window and the most recent one. It tracks direction, not absolute population.Full methodology →
8Routes In RegionSurvey routesHow many standard-protocol BBS routes contributed counts. More routes means a steadier, better-sampled index; very thin coverage is suppressed.Full methodology →
14YearsYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →

Notable SignalsNotable signalsLong-arc shifts the engine flags automatically — sustained declines or increases large enough to stand out from year-to-year noise.Full methodology →

long arc declinecomputed indexTrend sourceWhether the figure is our own computed route-weighted index or an official USGS modeled estimate. The current build labels every trend as computed.Full methodology →

Downy Woodpecker has collapsed in Sierra Madre Occidental: down 84% on the route-weighted index since 1975.

Routes In Sierra Madre Occidental

Routes recording Downy Woodpecker in Sierra Madre Occidental.
Recent countThe raw number of individuals recorded on this route in its most recent survey year. A single-route tally, not a trend.Full methodology →
AlpineARIZONA32015
WilliamsARIZONA22006
Mormon LakeARIZONA11969
Aztec PeakARIZONA11976
BlueARIZONA11989
Forest LakesARIZONA12022
Happy JackARIZONA12017
ReserveNEW-MEXICO11997

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