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BBS Route · Maryland · BCR 29

Randallstown Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 103 species recorded across 44 survey years, still active.

103Species 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 →
44Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2013Span
7Observers

Bird Species Found on Maryland Randallstown

Top 40 of 103 species by most recent count. Each links to its species trend.

Species recorded on the Randallstown 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 StarlingSturnidae972013-78%1968
American CrowCorvidae472013-16%1968
Gray CatbirdMimidae382013-13%1968
American RobinTurdidae382013-66%1968
Mourning DoveColumbidae312013+8%1968
Northern CardinalCardinalidae252013-32%1968
Carolina WrenTroglodytidae222013+500%1971
Northern MockingbirdMimidae202013-37%1968
Northern House WrenTroglodytidae182013-4%1968
Red-winged BlackbirdIcteridae172013-92%1968
Chipping SparrowPasserellidae172013-51%1968
Canada GooseAnatidae172011-54%1994
Red-bellied WoodpeckerPicidae162013+144%1968
Indigo BuntingCardinalidae162013-41%1968
Tufted TitmouseParidae162013+16%1968
Song SparrowPasserellidae122013-72%1968
House FinchFringillidae122013+500%1980
House SparrowPasseridae112013-89%1968
Fish CrowCorvidae112013+750%1976
Blue JayCorvidae102013-73%1968
Red-eyed VireoVireonidae82013+8%1969
Chimney SwiftApodidae72013-66%1968
Eastern KingbirdTyrannidae52013-70%1968
Common GrackleIcteridae52013-95%1968
Barn SwallowHirundinidae52013-56%1968
Wood ThrushTurdidae52013-58%1968
Eastern BluebirdTurdidae52013+71%1968
Great Crested FlycatcherTyrannidae42013+0%1971
Eastern Wood-PeweeTyrannidae42013-63%1968
Orchard OrioleIcteridae42013+233%1977
American GoldfinchFringillidae42013-63%1968
Eastern TowheePasserellidae42013-72%1968
MallardAnatidae41998-23%1976
Scarlet TanagerCardinalidae32013+29%1972
Rock PigeonColumbidae32011-94%1971
Yellow WarblerParulidae32013+25%1975
Blue-gray GnatcatcherPolioptilidae32009+75%1977
Hairy WoodpeckerPicidae22012+0%1979
Willow FlycatcherTyrannidae22013-20%1977
White-breasted NuthatchSittidae22013+167%1968

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