BirdAnalyst
BBS Route · Maryland · BCR 30

Madison Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 134 species recorded across 57 survey years, still active.

134Species 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 →
57Years 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
4Observers

Bird Species Found on Maryland Madison

Top 40 of 134 species by most recent count. Each links to its species trend.

Species recorded on the Madison 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
Red-winged BlackbirdIcteridae1562024-25%1968
Purple MartinHirundinidae722024-10%1968
Turkey VultureCathartidae632024+814%1969
Carolina WrenTroglodytidae63202413×1968
Pine WarblerParulidae622024+221%1968
Double-crested CormorantPhalacrocoracidae562023+119%1992
American CrowCorvidae552024+47%1968
Common YellowthroatParulidae492024+36%1968
Great Crested FlycatcherTyrannidae452024+419%1968
Northern CardinalCardinalidae402024+8%1968
Canada GooseAnatidae372024+667%1983
Mourning DoveColumbidae362024+237%1968
Brown-headed CowbirdIcteridae342024+440%1968
Common GrackleIcteridae322024-61%1968
Tree SwallowHirundinidae292024+555%1968
Tufted TitmouseParidae232024+215%1968
European StarlingSturnidae212024+107%1968
Northern House WrenTroglodytidae212024+104%1968
Carolina ChickadeeParidae172024+46%1968
OvenbirdParulidae172024+575%1973
Bald EagleAccipitridae172024+867%1983
House SparrowPasseridae162024-67%1968
Northern MockingbirdMimidae162024+86%1968
Eastern Wood-PeweeTyrannidae152024+144%1968
Brown-headed NuthatchSittidae152024+180%1968
Fish CrowCorvidae152024+30%1971
Downy WoodpeckerPicidae122024+260%1968
Barn SwallowHirundinidae122024-69%1968
Blue GrosbeakCardinalidae122024+264%1971
OspreyPandionidae122024+278%1972
Northern BobwhiteOdontophoridae112024-91%1968
Orchard OrioleIcteridae112024+107%1971
Laughing GullLaridae102024+0%1969
Seaside SparrowPasserellidae102024-5%1968
Black VultureCathartidae102024+375%1980
Indigo BuntingCardinalidae92024+13%1968
Clapper RailRallidae92024+188%1976
Chipping SparrowPasserellidae82024+10%1968
Pileated WoodpeckerPicidae82024+233%1973
Wood DuckAnatidae82024+320%1989

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