BirdAnalyst
BBS Route · Texas · BCR 19

Williams Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 75 species recorded across 20 survey years, still active.

75Species 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 →
20Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1996–2025Span
4Observers

Bird Species Found on Texas Williams

Top 40 of 75 species by most recent count. Each links to its species trend.

Species recorded on the Williams 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 DoveColumbidae1322025-24%1998
Northern BobwhiteOdontophoridae662025-67%1998
Northern MockingbirdMimidae412025+12%1998
Cassin's SparrowPasserellidae282025+125%1999
Common GrackleIcteridae212025+68%2000
DickcisselCardinalidae192025-42%1998
Western Cattle-EgretArdeidae192007n/an/a
Common NighthawkCaprimulgidae182025+244%1998
Eastern MeadowlarkIcteridae182025-86%1998
Lark SparrowPasserellidae182025+838%1999
Painted BuntingCardinalidae172025+400%1998
Northern Rough-winged SwallowHirundinidae16202112×2007
Great-tailed GrackleIcteridae152025-81%1998
Scissor-tailed FlycatcherTyrannidae142025-43%1998
Golden-fronted WoodpeckerPicidae122025-32%1998
Grasshopper SparrowPasserellidae112025-21%1998
Rock PigeonColumbidae102025-12%1999
Chihuahuan RavenCorvidae92025+243%2002
Eurasian Collared-DoveColumbidae92025-14%2010
Northern CardinalCardinalidae82025+150%2000
Barn SwallowHirundinidae72025-43%1998
House SparrowPasseridae72025-59%1998
Eastern BluebirdTurdidae72021-6%2006
Bullock's OrioleIcteridae62021+360%1998
Turkey VultureCathartidae62024-9%2001
Chimney SwiftApodidae62023-25%2002
Blue GrosbeakCardinalidae62024+300%2003
Cliff SwallowHirundinidae62025+36%1999
Red-tailed HawkAccipitridae52025+133%1998
Greater RoadrunnerCuculidae52025-22%2005
Western KingbirdTyrannidae42025-85%1998
Eastern Screech-OwlStrigidae41997n/an/a
Brown-headed CowbirdIcteridae42025-40%1999
European StarlingSturnidae42019-50%2005
Yellow-billed CuckooCuculidae32025-79%1998
American CrowCorvidae32025-69%1998
Red-winged BlackbirdIcteridae32025-72%1998
KilldeerCharadriidae32025-6%1999
Ash-throated FlycatcherTyrannidae32025+375%1999
Horned LarkAlaudidae32025+100%2002

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