BirdAnalyst
BBS Route · Maryland · BCR 29

Bachman Mill Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 104 species recorded across 58 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 →
58Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1966–2024Span
8Observers

Bird Species Found on Maryland Bachman Mill

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

Species recorded on the Bachman Mill 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 StarlingSturnidae1412024-13%1968
American RobinTurdidae952024+207%1968
Red-winged BlackbirdIcteridae672024-34%1968
Gray CatbirdMimidae662024+166%1968
American CrowCorvidae462024-15%1968
Northern CardinalCardinalidae382024+490%1968
Mourning DoveColumbidae372024+133%1968
Barn SwallowHirundinidae332024-9%1968
Song SparrowPasserellidae272024+47%1968
Northern MockingbirdMimidae222024+37%1968
Red-bellied WoodpeckerPicidae20202413×1968
Common GrackleIcteridae202024-85%1968
House SparrowPasseridae202024-64%1968
Chipping SparrowPasserellidae172024+55%1968
Canada GooseAnatidae172023-36%1992
Wood ThrushTurdidae132024-16%1968
Rock PigeonColumbidae122023-2%1968
Carolina WrenTroglodytidae10202411×1972
Northern House WrenTroglodytidae102024-33%1968
Eastern Wood-PeweeTyrannidae92024+45%1968
Indigo BuntingCardinalidae92024+0%1968
Tufted TitmouseParidae92024+189%1969
Northern Rough-winged SwallowHirundinidae92024+186%1979
American GoldfinchFringillidae82024-9%1968
Field SparrowPasserellidae82024-56%1968
Red-eyed VireoVireonidae82024+94%1968
House FinchFringillidae82024-28%1986
Blue JayCorvidae62024-27%1968
Common YellowthroatParulidae62024-30%1968
Brown-headed CowbirdIcteridae52024-27%1968
OvenbirdParulidae52024+129%1969
Eastern BluebirdTurdidae52024+250%1970
Acadian FlycatcherTyrannidae52024+140%1976
Cedar WaxwingBombycillidae52024+60%1988
Eastern TowheePasserellidae42024-70%1968
Chimney SwiftApodidae32024-35%1968
Fish CrowCorvidae32009+75%1982
Brown ThrasherMimidae32024-58%1968
VeeryTurdidae32024+140%1971
Northern BobwhiteOdontophoridae21994-78%1968

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