BirdAnalyst
Species · BCR 35 · BBS 2026 Release · 1966–2025

Zone-tailed Hawk In Chihuahuan Desert

All regionsChihuahuan DesertBirds of prey

Zone-tailed Hawk in Chihuahuan Desert has declined: down 34% on the route-weighted index since 1999.

-34%Since 1999TrendPercent 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 →
9Routes 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 →
15YearsYears 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 →

No notable trend signals for Zone-tailed Hawk in Chihuahuan Desert. See the full index history below.

Routes In Chihuahuan Desert

Routes recording Zone-tailed Hawk in Chihuahuan Desert.
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 →
CarrizozoNEW-MEXICO11968
Red RockNEW-MEXICO12025
ComstockTEXAS12008
Casa PiedraTEXAS12023
Bear MtnTEXAS11999
PresidioTEXAS12010
Devils R CynTEXAS12025
ToyahvaleTEXAS12025
PumpvilleTEXAS12019

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14.