BirdAnalyst
BBS Route · Maryland · BCR 30

Pr Frederick Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 33 survey years, still active.

92Species 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 →
33Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2025Span
2Observers

Bird Species Found on Maryland Pr Frederick

Top 40 of 92 species by most recent count. Each links to its species trend.

Species recorded on the Pr Frederick 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
Northern CardinalCardinalidae1012025+135%1993
American CrowCorvidae582025+26%1993
Chipping SparrowPasserellidae472025+23%1993
Mourning DoveColumbidae432025+33%1993
European StarlingSturnidae382025-43%1993
American RobinTurdidae382025-7%1993
Tufted TitmouseParidae352025+139%1993
Common GrackleIcteridae312025-55%1993
Northern MockingbirdMimidae272025-26%1993
Carolina WrenTroglodytidae242025-5%1993
House FinchFringillidae202025-28%1993
Indigo BuntingCardinalidae172025-54%1993
Eastern BluebirdTurdidae172025+104%1993
Red-bellied WoodpeckerPicidae162025+114%1993
Chimney SwiftApodidae162025+15%1993
Red-eyed VireoVireonidae152025-59%1993
Blue GrosbeakCardinalidae142025+16%1993
Western Cattle-EgretArdeidae131991n/an/a
Canada GooseAnatidae122025+110%2005
Blue-gray GnatcatcherPolioptilidae112025+50%1993
American GoldfinchFringillidae102025+108%1993
House SparrowPasseridae92025-50%1993
Carolina ChickadeeParidae92025+74%1993
Blue JayCorvidae82025+12%1993
Eastern MeadowlarkIcteridae72005+13%1993
Wood ThrushTurdidae72025-75%1993
White-breasted NuthatchSittidae72025+300%2003
Great Crested FlycatcherTyrannidae62025+75%1993
Acadian FlycatcherTyrannidae62025-14%1993
Brown-headed CowbirdIcteridae62025+0%1993
Northern ParulaParulidae62025-62%1993
Eastern Wood-PeweeTyrannidae52025-46%1993
Eastern TowheePasserellidae52024-83%1993
Yellow-billed CuckooCuculidae42025-13%1996
Grasshopper SparrowPasserellidae42025-46%1993
Purple MartinHirundinidae42025-74%1993
Red-shouldered HawkAccipitridae32025+17%1997
Eastern KingbirdTyrannidae32024-33%1993
Red-winged BlackbirdIcteridae32025+0%1993
Orchard OrioleIcteridae32025-36%1993

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