BirdAnalyst
Species · BCR 37 · BBS 2025 Release · 1966–2024

American Avocet In Gulf Coastal Prairie

All regionsGulf Coastal PrairieShorebirds

American Avocet in Gulf Coastal Prairie has collapsed: down 83% on the route-weighted index since 2006.

-83%Since 2006TrendPercent 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 →
14YearsYears 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 →

American Avocet has collapsed in Gulf Coastal Prairie: down 83% on the route-weighted index since 2006.

Routes In Gulf Coastal Prairie

Routes recording American Avocet in Gulf Coastal Prairie.
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 →
Lag AtascosaTEXAS92018
L. Atascosa NwrTEXAS42021
Gran ChenierLOUISIANA21971
CreoleLOUISIANA21971
IndianolaTEXAS22006
Bayside 3TEXAS22018
Ltl ChenierLOUISIANA12008
San PedroTEXAS12016
Loyola Beach 2TEXAS12021

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