BirdAnalyst
BBS Route · Maryland · BCR 30

Vienna Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 105 species recorded across 55 survey years, still active.

105Species 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 →
55Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2025Span
6Observers

Bird Species Found on Maryland Vienna

Top 40 of 105 species by most recent count. Each links to its species trend.

Species recorded on the Vienna 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
European StarlingSturnidae842025-7%1968
Common GrackleIcteridae642025-48%1968
Mourning DoveColumbidae452025+26%1968
American RobinTurdidae392025-4%1968
American CrowCorvidae332025+66%1968
Purple MartinHirundinidae332025+228%1968
Northern CardinalCardinalidae312025-33%1968
Northern MockingbirdMimidae272025-4%1968
Tufted TitmouseParidae252025+91%1968
Red-winged BlackbirdIcteridae232025-66%1968
Red-bellied WoodpeckerPicidae212025+47%1968
Blue GrosbeakCardinalidae212025+393%1968
Turkey VultureCathartidae19202517×1968
Brown-headed CowbirdIcteridae182025-16%1968
Indigo BuntingCardinalidae172025+55%1968
Barn SwallowHirundinidae132025-47%1968
Carolina WrenTroglodytidae13202515×1969
House SparrowPasseridae122025-84%1968
Canada GooseAnatidae122025-22%2001
Great Crested FlycatcherTyrannidae82025+367%1968
Black VultureCathartidae82025-28%1990
Blue JayCorvidae72025-43%1968
Bald EagleAccipitridae72025+300%2006
Orchard OrioleIcteridae62025+143%1971
Rock PigeonColumbidae62025-64%1969
Laughing GullLaridae62025+350%2003
Eastern BluebirdTurdidae52025+60%1974
Fish CrowCorvidae52025+57%1989
Chipping SparrowPasserellidae42025-77%1968
American RedstartParulidae41980-25%1978
Yellow-billed CuckooCuculidae32025-75%1968
Belted KingfisherAlcedinidae32010+67%1973
Chimney SwiftApodidae32025-77%1968
Eastern PhoebeTyrannidae32024-44%1969
Horned LarkAlaudidae32025-5%1968
American GoldfinchFringillidae32025-53%1968
Grasshopper SparrowPasserellidae32025+20%1968
Red-eyed VireoVireonidae32025-31%1968
Common YellowthroatParulidae32025-72%1968
Blue-gray GnatcatcherPolioptilidae32025-44%1968

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