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

Green Heron In Chihuahuan Desert

All regionsChihuahuan DesertWetland birds

Green Heron in Chihuahuan Desert has fallen sharply: down 60% on the route-weighted index since 1995.

-60%Since 1995TrendPercent 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 →
6Routes 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 →
16YearsYears 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 →

Green Heron has fallen sharply in Chihuahuan Desert: down 60% on the route-weighted index since 1995.

Routes In Chihuahuan Desert

Routes recording Green Heron 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 →
Casa PiedraTEXAS51992
LaborcitaNEW-MEXICO32018
MesillaNEW-MEXICO32000
Bitter LakeNEW-MEXICO12011
Quitman Cyn.TEXAS12006
CanutilloTEXAS12015

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