BirdAnalyst
BBS Route · Texas · BCR 37

Lag Atascosa Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 127 species recorded across 48 survey years, still active.

127Species 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 →
48Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2024Span
13Observers

Bird Species Found on Texas Lag Atascosa

Top 40 of 127 species by most recent count. Each links to its species trend.

Species recorded on the Lag Atascosa 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 GrackleIcteridae2892024-71%1971
Laughing GullLaridae772024+121%1971
Mourning DoveColumbidae742024+17%1971
Red-winged BlackbirdIcteridae702024-22%1971
House SparrowPasseridae552024-86%1971
Common NighthawkCaprimulgidae382024+359%1971
Northern MockingbirdMimidae372024-46%1971
Purple MartinHirundinidae36202412×1994
Black-bellied Whistling-DuckAnatidae352024+133%1971
Cave SwallowHirundinidae312024-66%2004
Olive SparrowPasserellidae262024+763%1971
Golden-fronted WoodpeckerPicidae232024+363%1971
Couch's KingbirdTyrannidae23202412×1979
White-winged DoveColumbidae222024-72%1971
European StarlingSturnidae212024+127%1990
Eastern MeadowlarkIcteridae142024-74%1971
Rock PigeonColumbidae132024+9%1975
Lark SparrowPasserellidae122024+275%1984
Scissor-tailed FlycatcherTyrannidae102024-18%1971
Eurasian Collared-DoveColumbidae102024+109%2005
American AvocetRecurvirostridae92018+125%1971
Great KiskadeeTyrannidae92024+214%1978
Loggerhead ShrikeLaniidae92024+400%2004
Black-crowned Night HeronArdeidae82023+43%1984
Chimney SwiftApodidae82024+180%2004
Brown-headed CowbirdIcteridae72024+8%1986
Mottled DuckAnatidae62023-74%1971
Brown-crested FlycatcherTyrannidae62024+300%1971
Bronzed CowbirdIcteridae62024-56%1971
Hooded OrioleIcteridae62024+100%1992
Great Blue HeronArdeidae62024-70%1976
Double-crested CormorantPhalacrocoracidae61992+500%1989
Cliff SwallowHirundinidae62021+571%1996
Green HeronArdeidae52024+40%1978
Western KingbirdTyrannidae52024+100%1987
Tropical KingbirdTyrannidae52024+56%2015
Black SkimmerLaridae41989-73%1971
White-faced IbisThreskiornithidae42017-52%1975
DickcisselCardinalidae42024-5%1974
Long-billed ThrasherMimidae42024+433%1973

Source: USGS North American Breeding Bird Survey, retrieved 2026-05-22. A route is a sample, not a census.