BirdAnalyst
Species · BCR 36 · BBS 2025 Release · 1966–2024

Mexican Duck In Tamaulipan Brushlands

All regionsTamaulipan BrushlandsWaterfowl

Mexican Duck in Tamaulipan Brushlands has held roughly steady: up 2% on the route-weighted index since 2002.

+2%Since 2002TrendPercent 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 →
5Routes 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 →

No notable trend signals for Mexican Duck in Tamaulipan Brushlands. See the full index history below.

Routes In Tamaulipan Brushlands

Routes recording Mexican Duck in Tamaulipan Brushlands.
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 →
CatarinaTEXAS22009
GuerraTEXAS22013
Cavasara Cr.TEXAS22013
Catarina 2TEXAS12017
LaredoTEXAS12011

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