BirdAnalyst
BBS Route · Texas · BCR 37

L. Atascosa Nwr Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 108 species recorded across 26 survey years, still active.

108Species RecordedSpecies recordedDistinct species detected on standard-protocol BBS runs here across all years on record — a measure of survey breadth, not a complete checklist.Full methodology →
26Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1998–2025Span
2Observers

Bird Species Found on Texas L. Atascosa Nwr

Top 40 of 108 species by most recent count. Each links to its species trend.

Species recorded on the L. Atascosa Nwr route.
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 →TrendPercent 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 →Baseline yearThe first year of the smoothed window the trend is measured from. An earlier baseline means a longer record stands behind the number.Full methodology →History
Great-tailed GrackleIcteridae1652025+39%2000
Red-winged BlackbirdIcteridae952025+20%2000
Tricolored HeronArdeidae782025+950%2000
Bronzed CowbirdIcteridae652025+89%2000
Mourning DoveColumbidae612025-44%2000
Laughing GullLaridae572025-73%2000
Forster's TernLaridae422025-24%2003
White IbisThreskiornithidae362025+84%2000
Black-necked StiltRecurvirostridae34202519×2000
Great Blue HeronArdeidae282025+640%2002
Common Ground DoveColumbidae262025-47%2000
WilletScolopacidae252025+16%2000
Fulvous Whistling-DuckAnatidae232025+300%2016
Northern MockingbirdMimidae222025-39%2000
Long-billed CurlewScolopacidae202023+3%2005
Great EgretArdeidae162025+45%2000
Brown-crested FlycatcherTyrannidae162025+112%2000
Snowy EgretArdeidae152025+264%2002
Northern CardinalCardinalidae142025+135%2000
White-eyed VireoVireonidae142025-22%2000
Long-billed ThrasherMimidae142025+193%2000
Neotropic CormorantPhalacrocoracidae142025+177%2008
Olive SparrowPasserellidae122025-76%2000
Golden-fronted WoodpeckerPicidae112025+84%2000
Black-bellied Whistling-DuckAnatidae102025+81%2000
Couch's KingbirdTyrannidae102025+271%2000
Roseate SpoonbillThreskiornithidae92025-68%2001
Yellow-billed CuckooCuculidae92025+93%2000
Groove-billed AniCuculidae92025+0%2005
American White PelicanPelecanidae82019-72%2009
Turkey VultureCathartidae72025-11%2000
Caspian TernLaridae72025-16%2005
Eastern MeadowlarkIcteridae62025-78%2000
Plain ChachalacaCracidae62025+180%2002
Black VultureCathartidae62023+140%2004
Wood StorkCiconiidae62019-67%2008
Green HeronArdeidae62025+50%2005
Mottled DuckAnatidae52023-60%2000
Northern BobwhiteOdontophoridae52025+46%2000
Least TernLaridae42025+400%2004

Source: USGS North American Breeding Bird Survey, retrieved 2026-08-14. A route is a sample, not a census.