BirdAnalyst
BBS Route · Maryland · BCR 28

Green Ridge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 25 survey years, still active.

99Species 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 →
25Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1995–2024Span
2Observers

Bird Species Found on Maryland Green Ridge

Top 40 of 99 species by most recent count. Each links to its species trend.

Species recorded on the Green Ridge 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-eyed VireoVireonidae612024+9%1997
Chipping SparrowPasserellidae332024-4%1997
Scarlet TanagerCardinalidae322024-21%1997
Eastern Wood-PeweeTyrannidae282024+67%1997
OvenbirdParulidae262024+0%1997
Northern CardinalCardinalidae252024+12%1997
Indigo BuntingCardinalidae252024-41%1997
Eastern TowheePasserellidae242024-45%1997
American RobinTurdidae202024-23%1997
White-breasted NuthatchSittidae172024+36%1997
Wood ThrushTurdidae172024-53%1997
Common RavenCorvidae162024+84%1997
Carolina WrenTroglodytidae152024+162%2000
American RedstartParulidae142024+58%1997
Red-bellied WoodpeckerPicidae132024-10%1997
Turkey VultureCathartidae122024+229%2005
Gray CatbirdMimidae122024-30%1997
Field SparrowPasserellidae112024-21%1997
Red-winged BlackbirdIcteridae102024-43%1997
Common GrackleIcteridae102024+20%1997
Blue JayCorvidae92024-33%1997
American GoldfinchFringillidae92024-17%1997
Tufted TitmouseParidae92024-60%1997
Blue-gray GnatcatcherPolioptilidae92024+68%1997
Eastern PhoebeTyrannidae72024+8%1997
Acadian FlycatcherTyrannidae72024-5%1997
American CrowCorvidae72024-82%1997
Northern MockingbirdMimidae72024-29%1997
Brown ThrasherMimidae72024+91%1997
Mourning DoveColumbidae62024-56%1997
Pileated WoodpeckerPicidae62024-78%1997
Brown-headed CowbirdIcteridae62024-53%1997
Song SparrowPasserellidae62024-70%1997
Cedar WaxwingBombycillidae62024+64%1997
Worm-eating WarblerParulidae62024+13%1997
Barn SwallowHirundinidae52024-25%1997
Pine WarblerParulidae52024-46%1997
Yellow-billed CuckooCuculidae42024-67%1997
Downy WoodpeckerPicidae42024+100%1997
Eastern MeadowlarkIcteridae42024+0%1997

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