BirdAnalyst
BBS Route · Maryland · BCR 30

Pr Frederick Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 92 species recorded across 32 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 →
32Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1991–2024Span
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 CardinalCardinalidae762024+110%1993
Common GrackleIcteridae542024-53%1993
Mourning DoveColumbidae422024+22%1993
Chipping SparrowPasserellidae392024+25%1993
Tufted TitmouseParidae332024+121%1993
Canada GooseAnatidae302024+67%2005
Cedar WaxwingBombycillidae282023+252%1993
European StarlingSturnidae272024-53%1993
American CrowCorvidae262024+6%1993
Carolina WrenTroglodytidae252024-6%1993
Northern MockingbirdMimidae242024-32%1993
Carolina ChickadeeParidae232024+104%1993
American RobinTurdidae212024-20%1993
American GoldfinchFringillidae202024+96%1993
House SparrowPasseridae192024-47%1993
Eastern BluebirdTurdidae182024+125%1993
House FinchFringillidae162024-40%1993
Red-bellied WoodpeckerPicidae152024+119%1993
Chimney SwiftApodidae142024-6%1993
Red-eyed VireoVireonidae142024-61%1993
Western Cattle-EgretArdeidae131991n/an/a
Acadian FlycatcherTyrannidae132024-11%1993
Indigo BuntingCardinalidae122024-56%1993
Blue-gray GnatcatcherPolioptilidae122024+55%1993
Blue GrosbeakCardinalidae112024-13%1993
Brown-headed CowbirdIcteridae92024-13%1993
White-breasted NuthatchSittidae82024+300%2003
Red-winged BlackbirdIcteridae72024+137%1993
Eastern MeadowlarkIcteridae72005+13%1993
Blue JayCorvidae62024-8%1993
Kentucky WarblerParulidae62024+9%1993
Turkey VultureCathartidae52024+257%1993
Downy WoodpeckerPicidae52024+8%1993
Grasshopper SparrowPasserellidae52024-50%1993
Eastern TowheePasserellidae52024-83%1993
Fish CrowCorvidae52024+200%1996
Orchard OrioleIcteridae42024-29%1993
Common YellowthroatParulidae42024-76%1993
Brown ThrasherMimidae42024-13%1993
Wood ThrushTurdidae42024-83%1993

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