BirdAnalyst
BBS Route · Texas · BCR 35

Sierra Blanc Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 69 species recorded across 25 survey years, still active.

69Species 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 →
25Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1999–2025Span
2Observers

Bird Species Found on Texas Sierra Blanc

Top 40 of 69 species by most recent count. Each links to its species trend.

Species recorded on the Sierra Blanc 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
Ash-throated FlycatcherTyrannidae452025+59%2001
Black-throated SparrowPasserellidae382025+18%2001
PyrrhuloxiaCardinalidae202025+169%2001
Bell's VireoVireonidae202025+74%2001
Blue GrosbeakCardinalidae192025+25%2001
Northern MockingbirdMimidae192025-36%2001
Gambel's QuailOdontophoridae182025+422%2002
House FinchFringillidae172025-35%2001
Scott's OrioleIcteridae142025-8%2001
Yellow-breasted ChatIcteriidae112025+35%2001
Eurasian Collared-DoveColumbidae112025+329%2003
House SparrowPasseridae102025-15%2001
Black-tailed GnatcatcherPolioptilidae102025+13%2001
Western KingbirdTyrannidae92025-11%2001
White-winged DoveColumbidae72025+86%2003
Barn SwallowHirundinidae62025-36%2001
Cassin's KingbirdTyrannidae62025+90%2002
Turkey VultureCathartidae52025-19%2001
Say's PhoebeTyrannidae42025+0%2006
Cliff SwallowHirundinidae42019+175%2008
Chihuahuan RavenCorvidae32024-40%2001
Red-winged BlackbirdIcteridae32001n/an/a
Chihuahuan MeadowlarkIcteridae32019+17%2009
Scaled QuailOdontophoridae22025-71%2001
Mourning DoveColumbidae22025-54%2001
Common NighthawkCaprimulgidae22025-71%2001
White-throated SwiftApodidae22005+0%1999
Great-tailed GrackleIcteridae22025-74%2001
VerdinRemizidae22025-68%2001
Western Wood-PeweeTyrannidae22021+0%2006
Varied BuntingCardinalidae22009-33%2000
PhainopeplaPtiliogonatidae22016+50%2006
Swainson's HawkAccipitridae22022-17%2008
Canyon TowheePasserellidae22025+0%2014
Cave SwallowHirundinidae22019+63%2005
Lucy's WarblerParulidae22025+120%2008
Mexican DuckAnatidae22014+0%2010
KilldeerCharadriidae12024+33%2005
Ladder-backed WoodpeckerPicidae12025+0%2007
Lesser NighthawkCaprimulgidae12019-43%2001

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