BirdAnalyst
BBS Route · Maryland · BCR 30

Northeast Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 112 species recorded across 51 survey years, still active.

112Species 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 →
51Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2016Span
2Observers

Bird Species Found on Maryland Northeast

Top 40 of 112 species by most recent count. Each links to its species trend.

Species recorded on the Northeast 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
American RobinTurdidae422016-23%1968
Red-winged BlackbirdIcteridae272016-37%1968
Northern CardinalCardinalidae272016+102%1968
American CrowCorvidae232016-8%1968
Tufted TitmouseParidae222016+228%1968
Carolina WrenTroglodytidae21201614×1969
Double-crested CormorantPhalacrocoracidae202008+420%1991
Red-eyed VireoVireonidae192016+281%1969
European StarlingSturnidae162016-85%1968
Northern MockingbirdMimidae122016-34%1968
Barn SwallowHirundinidae112016+50%1968
House FinchFringillidae112016+350%1983
Blue JayCorvidae92016-47%1968
Chipping SparrowPasserellidae92016-39%1968
OvenbirdParulidae92016+158%1968
Gray CatbirdMimidae92016-17%1968
Turkey VultureCathartidae92016+63%1972
Indigo BuntingCardinalidae82016-63%1968
Ring-billed GullLaridae82002+300%1980
Song SparrowPasserellidae72016-39%1968
House SparrowPasseridae72016-86%1968
Mourning DoveColumbidae62016-60%1968
Common GrackleIcteridae62016-91%1968
American GoldfinchFringillidae52016-54%1968
Bank SwallowHirundinidae51994-41%1969
Eastern BluebirdTurdidae52016+225%1968
Red-bellied WoodpeckerPicidae42016+33%1968
Chimney SwiftApodidae42016-52%1969
Wood ThrushTurdidae42016-77%1968
MallardAnatidae42016+140%1971
Fish CrowCorvidae32014-25%1973
Northern House WrenTroglodytidae32016-19%1968
Brown ThrasherMimidae32016+18%1969
Canada GooseAnatidae32016+188%1973
Little Blue HeronArdeidae31972n/an/a
Cedar WaxwingBombycillidae32016+33%1983
KilldeerCharadriidae22016-58%1968
Northern BobwhiteOdontophoridae21996-93%1968
Downy WoodpeckerPicidae22016-60%1968
Eastern Whip-poor-willCaprimulgidae22009-17%1968

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