BirdAnalyst
BBS Route · Texas · BCR 21

Muldoon Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 96 species recorded across 45 survey years, still active.

96Species 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 →
45Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1970–2025Span
5Observers

Bird Species Found on Texas Muldoon

Top 40 of 96 species by most recent count. Each links to its species trend.

Species recorded on the Muldoon 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 CardinalCardinalidae1492025+144%1972
Mourning DoveColumbidae942025+1%1972
Painted BuntingCardinalidae642025+238%1972
Cliff SwallowHirundinidae492025+134%1972
Northern MockingbirdMimidae492025+3%1972
Eastern MeadowlarkIcteridae432025-71%1972
American CrowCorvidae392025-40%1972
Carolina ChickadeeParidae302025+718%1972
Purple MartinHirundinidae272025+246%1972
Red-winged BlackbirdIcteridae262025+159%1972
Carolina WrenTroglodytidae212025+190%1972
Brown-headed CowbirdIcteridae202025-37%1972
Black VultureCathartidae172025+400%1988
House SparrowPasseridae162025-65%1972
Red-bellied WoodpeckerPicidae142025-3%1972
Turkey VultureCathartidae142025+182%1973
White-eyed VireoVireonidae132025+633%1974
Lark SparrowPasserellidae122025+20%1972
Blue JayCorvidae92025-28%1972
Tufted TitmouseParidae92025+278%1973
Scissor-tailed FlycatcherTyrannidae82025-42%1972
Common GrackleIcteridae82025-26%1973
Barn SwallowHirundinidae82025+283%1984
DickcisselCardinalidae72025+253%1973
Eastern BluebirdTurdidae72025+233%1975
Western Cattle-EgretArdeidae72021+145%1988
Wild TurkeyPhasianidae72015+350%2013
Cave SwallowHirundinidae62017+150%2004
Yellow-billed CuckooCuculidae52025+100%1972
Eastern KingbirdTyrannidae51998+400%1997
Green HeronArdeidae42024-65%1972
Crested CaracaraFalconidae42025+400%1995
Orchard OrioleIcteridae42008+300%1997
Eurasian Collared-DoveColumbidae42025+225%2004
KilldeerCharadriidae32025-68%1972
Rock PigeonColumbidae32025-57%1972
Chuck-will's-widowCaprimulgidae32025-50%1972
Chimney SwiftApodidae32025-44%1972
Great-tailed GrackleIcteridae32025-89%1972
Blue GrosbeakCardinalidae32024+100%1995

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