BirdAnalyst
BBS Route · Maryland · BCR 30

Largo Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 79 species recorded across 14 survey years, no longer active.

79Species 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 →
14Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–1981Span
4Observers

Bird Species Found on Maryland Largo

Top 40 of 79 species by most recent count. Each links to its species trend.

Species recorded on the Largo 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 StarlingSturnidae2521981+21%1970
House SparrowPasseridae1581981-28%1970
American RobinTurdidae711981+1%1970
Common GrackleIcteridae551981-50%1970
Northern CardinalCardinalidae531981+13%1970
Song SparrowPasserellidae461981+48%1970
Rock PigeonColumbidae431981-11%1970
Northern MockingbirdMimidae431981-24%1970
Chimney SwiftApodidae421981+246%1970
Carolina ChickadeeParidae311981+71%1970
American CrowCorvidae301981+5%1970
Blue JayCorvidae271981+7%1970
Mourning DoveColumbidae231981+53%1970
Red-winged BlackbirdIcteridae231981+120%1970
Gray CatbirdMimidae231981+3%1970
Wood ThrushTurdidae221981-6%1970
Brown-headed CowbirdIcteridae161981+125%1970
Tufted TitmouseParidae151981+81%1970
Eastern TowheePasserellidae141981-4%1970
Barn SwallowHirundinidae141981+420%1970
Indigo BuntingCardinalidae121981-45%1970
Common YellowthroatParulidae121981+28%1970
American RedstartParulidae101981+333%1971
Eastern KingbirdTyrannidae81981+44%1970
Carolina WrenTroglodytidae81981+113%1970
House FinchFringillidae81981+300%1979
Northern House WrenTroglodytidae71981+21%1970
Acadian FlycatcherTyrannidae61981+58%1971
Red-eyed VireoVireonidae61981-46%1970
American GoldfinchFringillidae51981+38%1973
Wood DuckAnatidae51978n/an/a
Northern BobwhiteOdontophoridae41981-78%1970
Downy WoodpeckerPicidae41981-25%1970
Chipping SparrowPasserellidae41981-57%1970
Baltimore OrioleIcteridae41981+167%1972
Northern Rough-winged SwallowHirundinidae31966n/an/a
Brown ThrasherMimidae31981+17%1970
White-eyed VireoVireonidae31981+120%1975
Blue-gray GnatcatcherPolioptilidae31980-20%1973
Blue GrosbeakCardinalidae31981+167%1973

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