BirdAnalyst
BBS Route · Texas · BCR 35

Casa Piedra Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 80 species recorded across 25 survey years, still active.

80Species 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 →
1986–2023Span
6Observers

Bird Species Found on Texas Casa Piedra

Top 40 of 80 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
Northern MockingbirdMimidae832023-19%1988
Black-throated SparrowPasserellidae662023+110%1988
Scaled QuailOdontophoridae312023-61%1988
PyrrhuloxiaCardinalidae272023+221%1988
Mourning DoveColumbidae232023+17%1988
Blue GrosbeakCardinalidae202023+420%1988
Bell's VireoVireonidae132023+300%1988
Lesser NighthawkCaprimulgidae122023+767%1988
House FinchFringillidae72022+63%1988
Cliff SwallowHirundinidae72023-86%1988
Turkey VultureCathartidae62023-49%1988
Great Horned OwlStrigidae62009+14%1989
Ash-throated FlycatcherTyrannidae62023+40%1988
Chihuahuan MeadowlarkIcteridae61998+14%1992
Cactus WrenTroglodytidae52023-62%1988
VerdinRemizidae52023+100%1988
Green HeronArdeidae51992n/an/a
Ladder-backed WoodpeckerPicidae42023-14%1992
Common NighthawkCaprimulgidae42023-66%1988
Brown-headed CowbirdIcteridae42023-61%1988
Cassin's SparrowPasserellidae42023-81%1988
Rock WrenTroglodytidae42022+0%1993
Curve-billed ThrasherMimidae32022-53%1988
Northern CardinalCardinalidae32023+200%1997
Eurasian Collared-DoveColumbidae32023+29%2012
Mexican DuckAnatidae22023-65%1992
Red-tailed HawkAccipitridae22021-31%1988
Western KingbirdTyrannidae22023-53%1989
Scott's OrioleIcteridae22023-41%1988
Lesser GoldfinchFringillidae22021-20%1993
Canyon TowheePasserellidae22019-10%1988
Summer TanagerCardinalidae22023+100%1989
Yellow-breasted ChatIcteriidae22023+50%1988
Black-tailed GnatcatcherPolioptilidae22023+25%1992
White-winged DoveColumbidae22023+18%1989
Western Wood-PeweeTyrannidae22023+0%1992
Burrowing OwlStrigidae22004+0%1992
American CootRallidae22006+100%1993
Common RavenCorvidae22022+100%2021
Gambel's QuailOdontophoridae22023+0%2022

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