BirdAnalyst
BBS Route · Maryland · BCR 30

Harmony Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 51 survey years, still active.

104Species 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 →
1966–2017Span
5Observers

Bird Species Found on Maryland Harmony

Top 40 of 104 species by most recent count. Each links to its species trend.

Species recorded on the Harmony 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
Common GrackleIcteridae2642017+15%1968
European StarlingSturnidae2022017+140%1968
Barn SwallowHirundinidae982017+438%1968
Turkey VultureCathartidae762017+772%1968
Purple MartinHirundinidae682017+531%1968
American RobinTurdidae632017+164%1968
Chipping SparrowPasserellidae582017+28%1968
Indigo BuntingCardinalidae562017+237%1968
Red-winged BlackbirdIcteridae552017+23%1968
Grasshopper SparrowPasserellidae462017+892%1968
Canada GooseAnatidae442017+688%2004
Blue GrosbeakCardinalidae432017+496%1968
Chimney SwiftApodidae422017+14%1968
Northern CardinalCardinalidae422017+24%1968
American CrowCorvidae412017-11%1968
Horned LarkAlaudidae362017+400%1968
Mourning DoveColumbidae312017-15%1968
Northern MockingbirdMimidae302017-21%1968
Carolina WrenTroglodytidae232017+285%1968
Cedar WaxwingBombycillidae202017+975%2007
Blue JayCorvidae192017+122%1968
House SparrowPasseridae192017-81%1968
Bald EagleAccipitridae172017+350%2012
Brown-headed CowbirdIcteridae162017+423%1968
Tufted TitmouseParidae152017-35%1968
American GoldfinchFringillidae132017+600%1969
Rock PigeonColumbidae122017-9%1968
Great Crested FlycatcherTyrannidae112017+32%1968
Red-bellied WoodpeckerPicidae102017-52%1968
Fish CrowCorvidae92017+540%1970
Red-eyed VireoVireonidae92017-56%1968
Laughing GullLaridae81987n/an/a
Wood ThrushTurdidae72017-66%1968
Eastern BluebirdTurdidae72017+100%1968
KilldeerCharadriidae72017+200%1969
Ring-necked PheasantPhasianidae71977n/an/a
Eastern KingbirdTyrannidae62017-15%1968
Eastern Wood-PeweeTyrannidae62017+189%1968
Field SparrowPasserellidae62017-69%1968
House FinchFringillidae62017+450%1986

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