BirdAnalyst
BBS Route · Texas · BCR 35

Slaughter Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 58 species recorded across 28 survey years, still active.

58Species 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 →
1968–2021Span
9Observers

Bird Species Found on Texas Slaughter

Top 40 of 58 species by most recent count. Each links to its species trend.

Species recorded on the Slaughter 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
Mourning DoveColumbidae302021+75%1970
Black-throated SparrowPasserellidae272021-29%1970
VerdinRemizidae272014+325%1975
Ash-throated FlycatcherTyrannidae252021+409%1970
Northern MockingbirdMimidae192014+30%1970
Cassin's SparrowPasserellidae162009-45%1977
Gambel's QuailOdontophoridae162014+41%1999
Western KingbirdTyrannidae152021+600%1970
Cactus WrenTroglodytidae152021-3%1970
PyrrhuloxiaCardinalidae122021+157%1973
Scaled QuailOdontophoridae82021-8%1970
Turkey VultureCathartidae72014-9%1970
Burrowing OwlStrigidae61999+14%1976
White-throated SwiftApodidae51999+400%1968
House FinchFringillidae52021+533%1972
Chihuahuan RavenCorvidae52021+175%1977
Common NighthawkCaprimulgidae42021+100%1988
Black-necked StiltRecurvirostridae42006n/an/a
Red-tailed HawkAccipitridae32006+100%1975
House SparrowPasseridae32021-66%1976
Ladder-backed WoodpeckerPicidae32014+100%1990
Swainson's HawkAccipitridae32021+0%1978
Greater RoadrunnerCuculidae22021+100%1973
Scott's OrioleIcteridae22014-53%1970
Blue GrosbeakCardinalidae22021-17%1977
Loggerhead ShrikeLaniidae22021-71%1970
Northern HarrierAccipitridae21975+0%1970
Black-chinned HummingbirdTrochilidae22014+100%1975
Brown-headed CowbirdIcteridae22021-71%1977
Western MeadowlarkIcteridae22014-21%1978
American KestrelFalconidae22021+100%1977
Golden EagleAccipitridae22014+100%1983
Common PoorwillCaprimulgidae22008+100%1986
European StarlingSturnidae22006n/an/a
Mexican DuckAnatidae22014n/an/a
Curve-billed ThrasherMimidae12014-33%1973
Crissal ThrasherMimidae12021-70%1977
Black-tailed GnatcatcherPolioptilidae12021+20%1992
Chihuahuan MeadowlarkIcteridae12021+25%1992
Rufous-crowned SparrowPasserellidae12014-60%2007

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