BirdAnalyst
BBS Route · Texas · BCR 21

Olney Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 106 species recorded across 48 survey years, still active.

106Species 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 →
48Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2024Span
5Observers

Bird Species Found on Texas Olney

Top 40 of 106 species by most recent count. Each links to its species trend.

Species recorded on the Olney 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
Cliff SwallowHirundinidae9602024+128%1972
Mourning DoveColumbidae652024-51%1972
Painted BuntingCardinalidae632024+833%1973
Northern CardinalCardinalidae492024+196%1972
Lark SparrowPasserellidae382024-17%1972
Scissor-tailed FlycatcherTyrannidae342024-44%1972
DickcisselCardinalidae282024+17%1972
Northern BobwhiteOdontophoridae162024-87%1972
Common GrackleIcteridae162024-67%1972
Western Cattle-EgretArdeidae162024+10%1997
American CrowCorvidae152024+59%1972
Brown-headed CowbirdIcteridae132024-52%1972
Eastern BluebirdTurdidae132024+33%1972
Northern MockingbirdMimidae122024-77%1972
Ladder-backed WoodpeckerPicidae122024+250%1976
Eurasian Collared-DoveColumbidae122024+83%2009
Bewick's WrenTroglodytidae112024+580%1973
Black-crested TitmouseParidae112024+471%1974
Yellow-billed CuckooCuculidae102024-17%1972
KilldeerCharadriidae92024-39%1972
Red-winged BlackbirdIcteridae82024-81%1972
Common NighthawkCaprimulgidae72024-83%1972
Eastern PhoebeTyrannidae72024+200%1972
Grasshopper SparrowPasserellidae72024+88%1982
House SparrowPasseridae72024-74%1972
Ash-throated FlycatcherTyrannidae72024+375%1976
Black VultureCathartidae72024+633%2005
Carolina ChickadeeParidae62024+300%1974
Red-bellied WoodpeckerPicidae62024+180%1984
Great Crested FlycatcherTyrannidae52024-7%1973
Cassin's SparrowPasserellidae52024-24%1987
Eastern KingbirdTyrannidae52021+200%1986
White-eyed VireoVireonidae52024+100%2018
Eastern MeadowlarkIcteridae42024-98%1972
Great-tailed GrackleIcteridae42024+145%1973
Mississippi KiteAccipitridae42024+140%1982
Golden-fronted WoodpeckerPicidae42018+200%1974
Wild TurkeyPhasianidae42018+450%1987
Northern Rough-winged SwallowHirundinidae31997-69%1981
Chimney SwiftApodidae32024-42%1974

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