BirdAnalyst
BBS Route · Texas · BCR 37

Lag Atascosa Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 127 species recorded across 49 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 →
49Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2025Span
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 GrackleIcteridae2312025-72%1971
Red-winged BlackbirdIcteridae802025-48%1971
House SparrowPasseridae692025-86%1971
Mourning DoveColumbidae662025+11%1971
Laughing GullLaridae542025+173%1971
Black-bellied Whistling-DuckAnatidae342025+22%1971
Golden-fronted WoodpeckerPicidae312025+381%1971
European StarlingSturnidae312025+173%1990
White IbisThreskiornithidae262025-21%1992
Eurasian Collared-DoveColumbidae262025+136%2005
Cave SwallowHirundinidae242025-65%2004
Olive SparrowPasserellidae222025+813%1971
Northern MockingbirdMimidae212025-56%1971
Snowy EgretArdeidae202025-5%1971
Eastern MeadowlarkIcteridae202025-71%1971
Purple MartinHirundinidae182025+775%1994
Brown-crested FlycatcherTyrannidae162025+433%1971
Rock PigeonColumbidae152025+55%1975
Turkey VultureCathartidae142025+233%2003
Common NighthawkCaprimulgidae132025+264%1971
White-faced IbisThreskiornithidae122025-28%1975
White-winged DoveColumbidae122025-76%1971
Scissor-tailed FlycatcherTyrannidae122025+18%1971
Couch's KingbirdTyrannidae122025+950%1979
Great KiskadeeTyrannidae122025+286%1978
WilletScolopacidae112025-71%1971
Bronzed CowbirdIcteridae92025-57%1971
American AvocetRecurvirostridae92018+125%1971
Ladder-backed WoodpeckerPicidae82025+275%1973
Tricolored HeronArdeidae82025+0%1972
Black-crowned Night HeronArdeidae82023+43%1984
Northern BobwhiteOdontophoridae72025-66%1971
DickcisselCardinalidae72025-18%1974
Loggerhead ShrikeLaniidae62025+360%2004
Cliff SwallowHirundinidae62021+571%1996
Northern CardinalCardinalidae52025+100%1972
Long-billed CurlewScolopacidae52025-48%1975
Green HeronArdeidae52025+120%1978
Harris's HawkAccipitridae52025+200%1999
Tropical KingbirdTyrannidae52025+67%2015

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