BirdAnalyst
BBS Route · Texas · BCR 21

Gause Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 87 species recorded across 30 survey years, no longer active.

87Species 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 →
30Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–1997Span
4Observers

Bird Species Found on Texas Gause

Top 40 of 87 species by most recent count. Each links to its species trend.

Species recorded on the Gause 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 CardinalCardinalidae841997+1%1970
Mourning DoveColumbidae611997-37%1970
Northern MockingbirdMimidae581997+8%1970
Great-tailed GrackleIcteridae501997-39%1970
American CrowCorvidae401997+67%1970
Painted BuntingCardinalidae371997+83%1970
Common GrackleIcteridae331997+117%1970
Barn SwallowHirundinidae24199713×1971
House SparrowPasseridae221997-86%1970
White-eyed VireoVireonidae201997+100%1972
DickcisselCardinalidae181997+15%1972
Eastern MeadowlarkIcteridae171997-80%1970
Northern Rough-winged SwallowHirundinidae171989+114%1978
Scissor-tailed FlycatcherTyrannidae161997-23%1970
Brown-headed CowbirdIcteridae151997-62%1970
Carolina WrenTroglodytidae141997+60%1970
Turkey VultureCathartidae121997-61%1970
Chimney SwiftApodidae111997+24%1970
Carolina ChickadeeParidae111997+10%1970
Blue-gray GnatcatcherPolioptilidae111997+64%1993
Inca DoveColumbidae111997+217%1993
Yellow-billed CuckooCuculidae91997-38%1970
Cave SwallowHirundinidae91997+200%1995
Blue JayCorvidae71997-6%1970
European StarlingSturnidae71997+67%1971
Red-winged BlackbirdIcteridae71997-63%1970
Purple MartinHirundinidae71997-60%1970
Cliff SwallowHirundinidae71997-43%1990
Black VultureCathartidae61997+83%1971
KilldeerCharadriidae41997-76%1971
Downy WoodpeckerPicidae41997-17%1971
American RobinTurdidae41997+300%1979
Western MeadowlarkIcteridae41977+100%1971
Western KingbirdTyrannidae41997+43%1992
Rock PigeonColumbidae31997+138%1977
Red-bellied WoodpeckerPicidae31997+325%1971
Lark SparrowPasserellidae31997-64%1970
Western Cattle-EgretArdeidae31997+187%1977
Great Blue HeronArdeidae31997+167%1983
Great Crested FlycatcherTyrannidae21996-19%1971

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