BirdAnalyst
Species · BCR 35 · BBS 2025 Release · 1966–2024

Lark Bunting In Chihuahuan Desert

All regionsChihuahuan DesertGrassland birds

Lark Bunting in Chihuahuan Desert has collapsed: down 78% on the route-weighted index since 1973.

-78%Since 1973TrendPercent 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 →
13YearsYears 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 →

Lark Bunting has collapsed in Chihuahuan Desert: down 78% on the route-weighted index since 1973.

Routes In Chihuahuan Desert

Routes recording Lark Bunting 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 →
AltudaTEXAS121981
RoswellNEW-MEXICO91979
EscondidaNEW-MEXICO42007
Lake ValleyNEW-MEXICO21987
GageNEW-MEXICO12003
JornadaNEW-MEXICO11979
Hot SpringsTEXAS12011
Chisos BasinTEXAS12012

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