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BBS Route · Texas · BCR 21

Three Rivers Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 98 species recorded across 25 survey years, still active.

98Species 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 →
1994–2025Span
9Observers

Bird Species Found on Texas Three Rivers

Top 40 of 98 species by most recent count. Each links to its species trend.

Species recorded on the Three Rivers 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 DoveColumbidae2252025+90%1996
White-winged DoveColumbidae1892025+334%1996
Northern CardinalCardinalidae912025+402%1996
Northern MockingbirdMimidae762025-57%1996
Brown-crested FlycatcherTyrannidae742025+183%1996
Black VultureCathartidae662025+462%1998
Golden-fronted WoodpeckerPicidae532025+81%1996
Bewick's WrenTroglodytidae532025+26%1996
Painted BuntingCardinalidae462025+10%1996
Eastern MeadowlarkIcteridae372025-66%1996
Purple MartinHirundinidae352025+39%1996
Olive SparrowPasserellidae332025+74%1996
Barn SwallowHirundinidae322025+35%1996
Scissor-tailed FlycatcherTyrannidae312025-56%1996
Long-billed ThrasherMimidae302025+470%1996
Couch's KingbirdTyrannidae282025+667%1996
Northern BobwhiteOdontophoridae272025-24%1996
Turkey VultureCathartidae252025-51%1996
American CrowCorvidae222025+100%2007
Lark SparrowPasserellidae212025-34%1996
Brown-headed CowbirdIcteridae202025-36%1996
Yellow-billed CuckooCuculidae182025-25%1996
Black-crested TitmouseParidae182025-10%1996
House SparrowPasseridae172025-13%1996
Greater RoadrunnerCuculidae152025+650%1997
Wild TurkeyPhasianidae142025-13%1999
Cassin's SparrowPasserellidae132025-86%1996
PyrrhuloxiaCardinalidae122025-12%1996
Little Blue HeronArdeidae112018+333%1996
Common Ground DoveColumbidae112025-62%1996
Red-winged BlackbirdIcteridae112025-42%1996
Ladder-backed WoodpeckerPicidae102025+10%1996
Common NighthawkCaprimulgidae102025-72%1996
Carolina WrenTroglodytidae102025+360%1999
Blue-gray GnatcatcherPolioptilidae102025+225%1999
Great KiskadeeTyrannidae102025+133%2013
European StarlingSturnidae92025+183%1996
White-eyed VireoVireonidae92025-33%1996
White-tipped DoveColumbidae92025+360%2019
Bullock's OrioleIcteridae72025+23%1996

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