BirdAnalyst
BBS Route · Maryland · BCR 30

Berlin Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 122 species recorded across 37 survey years, still active.

122Species 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 →
37Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1980–2025Span
5Observers

Bird Species Found on Maryland Berlin

Top 40 of 122 species by most recent count. Each links to its species trend.

Species recorded on the Berlin 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 CrowCorvidae452025+94%1982
Carolina WrenTroglodytidae332025+47%1982
Northern CardinalCardinalidae282025-9%1982
Common GrackleIcteridae222025-69%1982
European StarlingSturnidae212025-67%1982
Blue GrosbeakCardinalidae212025+9%1982
Tufted TitmouseParidae212025-34%1982
Indigo BuntingCardinalidae192025-46%1982
Northern MockingbirdMimidae172025+5%1982
Chipping SparrowPasserellidae162025-12%1982
White-eyed VireoVireonidae162025-39%1982
Blue-gray GnatcatcherPolioptilidae152025+227%1982
Pine WarblerParulidae142025-57%1982
Summer TanagerCardinalidae122025-3%1982
Carolina ChickadeeParidae122025-52%1982
Glossy IbisThreskiornithidae112021+150%1982
Red-eyed VireoVireonidae112025-76%1982
OvenbirdParulidae112025-77%1982
Brown-headed CowbirdIcteridae92025-81%1982
Acadian FlycatcherTyrannidae82025-53%1982
Red-winged BlackbirdIcteridae82025-13%1982
Purple MartinHirundinidae72025+167%1982
Grasshopper SparrowPasserellidae72025+57%1985
Mourning DoveColumbidae62025-39%1982
Red-bellied WoodpeckerPicidae62025-50%1982
Great Crested FlycatcherTyrannidae62025-12%1982
American GoldfinchFringillidae62025+56%1982
American RobinTurdidae62025-64%1982
Wood ThrushTurdidae52025-92%1982
Pileated WoodpeckerPicidae42025-13%1982
Eastern Wood-PeweeTyrannidae42025-70%1982
Horned LarkAlaudidae42025-81%1982
Orchard OrioleIcteridae42025-20%1982
Eastern TowheePasserellidae42025-86%1982
Prothonotary WarblerParulidae42025-16%1982
Worm-eating WarblerParulidae42025-23%1982
Common YellowthroatParulidae42025-82%1982
Gray CatbirdMimidae42022-39%1982
Hairy WoodpeckerPicidae42024+20%1985
Ring-billed GullLaridae42016-46%1988

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