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

Northern Pygmy-Owl In Sierra Madre Occidental

All regionsSierra Madre OccidentalGeneralists

Northern Pygmy-Owl in Sierra Madre Occidental has fallen sharply: down 65% on the route-weighted index since 1992.

-65%Since 1992TrendPercent 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 →
11Routes 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 →
17YearsYears 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 →

Northern Pygmy-Owl has fallen sharply in Sierra Madre Occidental: down 65% on the route-weighted index since 1992.

Routes In Sierra Madre Occidental

Routes recording Northern Pygmy-Owl 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 →
BlueARIZONA31987
Mt. GrahamARIZONA22019
PrescottARIZONA12022
AlpineARIZONA12021
SahuaritaARIZONA12008
SprucedaleARIZONA12008
PortalARIZONA12019
RuckerARIZONA12009
ReserveNEW-MEXICO12018
Vicks PeakNEW-MEXICO12000
Emory PassNEW-MEXICO12009

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