BirdAnalyst
BBS Route · Texas · BCR 18

Twichell Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 63 species recorded across 19 survey years, still active.

63Species 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 →
19Years 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
7Observers

Bird Species Found on Texas Twichell

Top 40 of 63 species by most recent count. Each links to its species trend.

Species recorded on the Twichell 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
Red-winged BlackbirdIcteridae2322025-39%1998
Horned LarkAlaudidae1702025+245%1998
Mourning DoveColumbidae1432025+5%1998
Great-tailed GrackleIcteridae1002025+185%1998
Western MeadowlarkIcteridae982025-15%1998
Western Cattle-EgretArdeidae912025n/an/a
Rock PigeonColumbidae74202513×2001
DickcisselCardinalidae482025+220%1998
Eurasian Collared-DoveColumbidae382025+253%2016
Common GrackleIcteridae372025+236%2010
House SparrowPasseridae302025-79%1998
Barn SwallowHirundinidae302025+33%1999
Western KingbirdTyrannidae292025+11%1998
Grasshopper SparrowPasserellidae252025+26%1998
Ring-necked PheasantPhasianidae242025-68%1998
Northern BobwhiteOdontophoridae222025+125%1999
European StarlingSturnidae202025+322%2001
White-winged DoveColumbidae12202312×2015
White-faced IbisThreskiornithidae112025n/an/a
Scissor-tailed FlycatcherTyrannidae82025+400%2001
Northern MockingbirdMimidae82025+367%2000
Chimney SwiftApodidae72018+133%2004
Swainson's HawkAccipitridae52023-47%1998
American KestrelFalconidae52025+0%1997
Eastern MeadowlarkIcteridae52025+175%2002
Lark SparrowPasserellidae52025+300%1999
Cassin's SparrowPasserellidae52025+360%2001
KilldeerCharadriidae42025-58%1998
Common NighthawkCaprimulgidae42025+225%1998
Turkey VultureCathartidae42017-14%2003
Black-crowned Night HeronArdeidae42025-9%1999
Cliff SwallowHirundinidae32010+200%1997
House FinchFringillidae32022-73%2000
American RobinTurdidae32023+167%2000
Blue JayCorvidae32017+200%2000
MallardAnatidae22025-35%1999
Brown-headed CowbirdIcteridae22023-56%2008
Lark BuntingPasserellidae22025-72%2004
American Barn OwlTytonidae22004+0%2003
Inca DoveColumbidae22018+100%2017

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