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

Dickcissel In Chihuahuan Desert

All regionsChihuahuan DesertGrassland birds

Dickcissel in Chihuahuan Desert has collapsed: down 89% on the route-weighted index since 1981.

-89%Since 1981TrendPercent 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 →
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 →

Dickcissel has collapsed in Chihuahuan Desert: down 88% on the route-weighted index since 1981.

Routes In Chihuahuan Desert

Routes recording Dickcissel 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 →
RoswellNEW-MEXICO21992
MarathonTEXAS22019
PumpvilleTEXAS22023
Bitter LakeNEW-MEXICO12007
ComstockTEXAS12007
CornudasTEXAS11986
OzonaTEXAS12022
Devils R CynTEXAS12011
Coyanda DrawTEXAS11998

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