BirdAnalyst
BBS Route · Texas · BCR 35

Casa Piedra Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 81 species recorded across 26 survey years, still active.

81Species 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 →
26Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1986–2025Span
7Observers

Bird Species Found on Texas Casa Piedra

Top 40 of 81 species by most recent count. Each links to its species trend.

Species recorded on the Casa Piedra 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
Black-throated SparrowPasserellidae862025+176%1988
Scaled QuailOdontophoridae702025-23%1988
Northern MockingbirdMimidae542025-22%1988
PyrrhuloxiaCardinalidae482025+296%1988
Mourning DoveColumbidae192025+19%1988
Blue GrosbeakCardinalidae152025+310%1988
Cactus WrenTroglodytidae152025-59%1988
Ash-throated FlycatcherTyrannidae132025+10%1988
Common NighthawkCaprimulgidae122025-46%1988
Lesser NighthawkCaprimulgidae122025+867%1988
Turkey VultureCathartidae112025-65%1988
VerdinRemizidae102025+120%1988
Bell's VireoVireonidae92025+263%1988
White-winged DoveColumbidae82025+32%1989
Cliff SwallowHirundinidae72023-86%1988
Black-tailed GnatcatcherPolioptilidae72025+38%1992
Great Horned OwlStrigidae62009+14%1989
House FinchFringillidae62025+25%1988
Chihuahuan MeadowlarkIcteridae61998+14%1992
Barn SwallowHirundinidae52025-36%1992
Green HeronArdeidae51992n/an/a
Ladder-backed WoodpeckerPicidae42025+29%1992
Brown-headed CowbirdIcteridae42025-61%1988
Cassin's SparrowPasserellidae42023-81%1988
Rock WrenTroglodytidae42022+0%1993
Yellow-breasted ChatIcteriidae32025+75%1988
Canyon WrenTroglodytidae32025+200%1986
Northern CardinalCardinalidae32023+200%1997
Golden-fronted WoodpeckerPicidae32025+0%2003
Mexican DuckAnatidae22023-65%1992
Red-tailed HawkAccipitridae22021-31%1988
Swainson's HawkAccipitridae22025+0%1989
Cassin's KingbirdTyrannidae22025-88%1988
Scott's OrioleIcteridae22023-41%1988
Canyon TowheePasserellidae22019-10%1988
Painted BuntingCardinalidae22025-33%1992
Summer TanagerCardinalidae22023+100%1989
Curve-billed ThrasherMimidae22025-63%1988
Western Wood-PeweeTyrannidae22023+0%1992
Orchard OrioleIcteridae22025-54%1993

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