BirdAnalyst
BBS Route · Texas · BCR 35

Delaware Crk Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 62 species recorded across 24 survey years, still active.

62Species 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 →
24Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1971–2015Span
5Observers

Bird Species Found on Texas Delaware Crk

Top 40 of 62 species by most recent count. Each links to its species trend.

Species recorded on the Delaware Crk 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 MockingbirdMimidae702015-28%1973
Cliff SwallowHirundinidae672015-88%1973
Black-throated SparrowPasserellidae572015-31%1973
Mourning DoveColumbidae562015+90%1973
Cassin's SparrowPasserellidae342015-45%1974
Scaled QuailOdontophoridae222015-78%1973
House FinchFringillidae192015+200%1973
Western KingbirdTyrannidae182015+50%1973
Cave SwallowHirundinidae172009n/an/a
Ash-throated FlycatcherTyrannidae152015+0%1973
Blue GrosbeakCardinalidae142015+77%1974
Scott's OrioleIcteridae112015+24%1974
Western MeadowlarkIcteridae101988-21%1982
Turkey VultureCathartidae82015+141%1973
Cassin's KingbirdTyrannidae82014+36%1976
Common NighthawkCaprimulgidae72015-39%1973
Cactus WrenTroglodytidae62015-86%1973
Brown-headed CowbirdIcteridae62015+56%1975
Horned LarkAlaudidae62015+100%1986
Loggerhead ShrikeLaniidae52015-46%1973
VerdinRemizidae52015+125%1973
Greater RoadrunnerCuculidae52015+33%1974
Rock PigeonColumbidae41980n/an/a
Say's PhoebeTyrannidae32015-13%1974
PyrrhuloxiaCardinalidae32014+13%1973
Bewick's WrenTroglodytidae32014+0%1981
Bell's VireoVireonidae32015+0%1987
Ferruginous HawkAccipitridae21971n/an/a
White-throated SwiftApodidae21971n/an/a
Painted BuntingCardinalidae22014+125%1974
Chihuahuan MeadowlarkIcteridae21987-18%1977
Orchard OrioleIcteridae22014+33%1982
Swainson's HawkAccipitridae22015-29%1987
Great-tailed GrackleIcteridae22009+100%1986
White-winged DoveColumbidae22011n/an/a
Red-tailed HawkAccipitridae12014+0%1974
Scissor-tailed FlycatcherTyrannidae11972-50%1971
Bullock's OrioleIcteridae12015+20%1974
Curve-billed ThrasherMimidae12015+0%1973
Great Horned OwlStrigidae12009+100%1981

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