BirdAnalyst
Species · Texas · BBS 2026 Release · 1966–2025

Black Rail Population Trend in Texas

All statesWetland birds

Black Rail in Texas has surged: up 87% on the route-weighted index since 1997.

+87%Since 1997TrendPercent 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 →
4Routes In StateSurvey 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 Black Rail Trends in TexasNotable 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 Black Rail in Texas. See the full index history below.

Black Rail Survey Routes in Texas

Routes recording Black Rail in Texas.
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 →
Chinquapin420252004
Oyster Lake119971997
Indianola120061995
L. Atascosa Nwr120222022

Black Rail Population Trend in Other States

alabamaarizonacaliforniacoloradofloridakansasmarylandnorth-carolina

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