BirdAnalyst
BBS Route · Texas · BCR 35

Girvin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 67 species recorded across 28 survey years, still active.

67Species 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 →
28Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1975–2025Span
9Observers

Bird Species Found on Texas Girvin

Top 40 of 67 species by most recent count. Each links to its species trend.

Species recorded on the Girvin 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
Northern MockingbirdMimidae792025+7%1977
PyrrhuloxiaCardinalidae482025+157%1977
Western KingbirdTyrannidae40202511×1977
Mourning DoveColumbidae382025-23%1977
Cassin's SparrowPasserellidae372025+35%1977
House FinchFringillidae362025+492%1978
Black-throated SparrowPasserellidae30202513×1977
Northern CardinalCardinalidae282024n/an/a
Cliff SwallowHirundinidae252025+128%1977
Scaled QuailOdontophoridae232025+52%1977
Ash-throated FlycatcherTyrannidae222025+773%1977
House SparrowPasseridae182025+52%1978
Blue GrosbeakCardinalidae122025+233%1977
Cactus WrenTroglodytidae122025+93%1977
European StarlingSturnidae112025-39%1997
Cave SwallowHirundinidae112017-83%1998
Barn SwallowHirundinidae102017-22%1994
Curve-billed ThrasherMimidae82024+164%1995
White-winged DoveColumbidae72025+650%2003
Eurasian Collared-DoveColumbidae72025+223%2006
Common NighthawkCaprimulgidae62025+3%1977
Bullock's OrioleIcteridae62025+118%1977
Painted BuntingCardinalidae52025+400%1980
Chihuahuan MeadowlarkIcteridae52002+64%1994
VerdinRemizidae52025+20%1995
Rock PigeonColumbidae52009+160%1996
Ladder-backed WoodpeckerPicidae42025+63%1977
Northern BobwhiteOdontophoridae42017+160%1980
Horned LarkAlaudidae42015-30%1979
Great-tailed GrackleIcteridae42025+76%1995
Greater RoadrunnerCuculidae32025+117%1979
Bronzed CowbirdIcteridae32017+133%2003
Red-winged BlackbirdIcteridae32017-75%1995
Turkey VultureCathartidae22025+50%1977
Harris's HawkAccipitridae22009-55%1977
Swainson's HawkAccipitridae22025+267%1977
Brown-headed CowbirdIcteridae22025-61%1977
Great Horned OwlStrigidae22025+133%1978
Common PoorwillCaprimulgidae22024+33%1993
Burrowing OwlStrigidae22024+80%1998

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