BirdAnalyst
BBS Route · Texas · BCR 18

Circle Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 84 species recorded across 39 survey years, still active.

84Species 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 →
39Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2024Span
9Observers

Bird Species Found on Texas Circle

Top 40 of 84 species by most recent count. Each links to its species trend.

Species recorded on the Circle 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 DoveColumbidae602024+133%1971
Western KingbirdTyrannidae60202414×1971
Lark BuntingPasserellidae532024+392%1997
Western MeadowlarkIcteridae372024+92%1971
Horned LarkAlaudidae322024-41%1971
House SparrowPasseridae282024-94%1971
Red-winged BlackbirdIcteridae92024-23%1971
Green HeronArdeidae91977n/an/a
Common GrackleIcteridae92024+100%1983
Swainson's HawkAccipitridae82024+14%1983
Barn SwallowHirundinidae8202412×1983
Scissor-tailed FlycatcherTyrannidae82023+220%1999
Great-tailed GrackleIcteridae7202415×1983
Eurasian Collared-DoveColumbidae72024+16%2007
Western Cattle-EgretArdeidae72018+125%2012
American AvocetRecurvirostridae62017+33%1977
Lark SparrowPasserellidae62024-36%1977
Field SparrowPasserellidae61968n/an/a
House FinchFringillidae62019+375%1972
Cassin's SparrowPasserellidae62024-60%1973
DickcisselCardinalidae62019+27%2009
Orchard OrioleIcteridae62024+200%2008
White-winged DoveColumbidae62024-52%2017
Rock PigeonColumbidae52024-74%1981
Blue GrosbeakCardinalidae52024+313%1983
MallardAnatidae42016-29%1974
Northern PintailAnatidae41982-33%1973
Ring-necked PheasantPhasianidae42019-67%1982
American RobinTurdidae42024+200%2002
KilldeerCharadriidae32023-61%1971
European StarlingSturnidae32024+150%1982
Cliff SwallowHirundinidae32023-42%2010
Yellow-headed BlackbirdIcteridae32024+25%2009
Grasshopper SparrowPasserellidae32024+100%1994
Brown-headed CowbirdIcteridae32019+13%2002
Blue-winged TealAnatidae22017+0%2009
Northern BobwhiteOdontophoridae22024+22%1971
Scaled QuailOdontophoridae22024+0%1977
Say's PhoebeTyrannidae22019+100%2015
Bullock's OrioleIcteridae22024+200%1983

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