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BBS Route · Texas · BCR 35

Girvin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 66 species recorded across 27 survey years, still active.

66Species 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 →
27Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1975–2024Span
9Observers

Bird Species Found on Texas Girvin

Top 40 of 66 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
Cassin's SparrowPasserellidae582017+51%1977
House SparrowPasseridae382024+46%1978
Black-throated SparrowPasserellidae36202411×1977
PyrrhuloxiaCardinalidae312024+134%1977
Ash-throated FlycatcherTyrannidae302024+655%1977
Northern CardinalCardinalidae282024n/an/a
Northern MockingbirdMimidae272024-7%1977
Scaled QuailOdontophoridae182024+31%1977
Mourning DoveColumbidae182024-23%1977
Lesser NighthawkCaprimulgidae182017+133%1986
Bullock's OrioleIcteridae152024+115%1977
House FinchFringillidae142024+283%1978
Western KingbirdTyrannidae132024+973%1977
Painted BuntingCardinalidae112024+350%1980
Cave SwallowHirundinidae112017-83%1998
Barn SwallowHirundinidae102017-22%1994
Eurasian Collared-DoveColumbidae102024+277%2006
Bewick's WrenTroglodytidae92017-52%1994
Curve-billed ThrasherMimidae82024+164%1995
Greater RoadrunnerCuculidae72017+217%1979
Common NighthawkCaprimulgidae72024+6%1977
Lark SparrowPasserellidae72017-61%1977
Swainson's HawkAccipitridae62017+267%1977
Ladder-backed WoodpeckerPicidae62024+63%1977
Scissor-tailed FlycatcherTyrannidae62024+50%1977
Chihuahuan MeadowlarkIcteridae52002+64%1994
Rock PigeonColumbidae52009+160%1996
Northern BobwhiteOdontophoridae42017+160%1980
Horned LarkAlaudidae42015-30%1979
White-winged DoveColumbidae42024+750%2003
Turkey VultureCathartidae32024+167%1977
Orchard OrioleIcteridae32024+117%1979
Bronzed CowbirdIcteridae32017+133%2003
Red-winged BlackbirdIcteridae32017-75%1995
Harris's HawkAccipitridae22009-55%1977
Great Horned OwlStrigidae22011+133%1978
Common PoorwillCaprimulgidae22024+33%1993
Burrowing OwlStrigidae22024+80%1998
Purple MartinHirundinidae21979n/an/a
Yellow-billed CuckooCuculidae22015+50%2001

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