BirdAnalyst
Species · BCR 37 · BBS 2026 Release · 1966–2025

Mallard In Gulf Coastal Prairie

All regionsGulf Coastal PrairieWaterfowl

Mallard in Gulf Coastal Prairie has declined: down 37% on the route-weighted index since 1985.

-37%Since 1985TrendPercent 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 →
10Routes 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 →

No notable trend signals for Mallard in Gulf Coastal Prairie. See the full index history below.

Routes In Gulf Coastal Prairie

Routes recording Mallard 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 →
GlencoeLOUISIANA202017
RichardLOUISIANA82010
Port AcresTEXAS42015
WinnieTEXAS31988
KatyTEXAS22025
MauriceLOUISIANA12001
WoodlawnLOUISIANA12017
IndianolaTEXAS11971
Rock IslandTEXAS12018
ChinquapinTEXAS12023

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