BirdAnalyst
BBS Route · Maryland · BCR 28

Green Ridge Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 99 species recorded across 26 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 →
26Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1995–2025Span
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 VireoVireonidae652025+12%1997
Chipping SparrowPasserellidae402025+11%1997
OvenbirdParulidae322025+10%1997
Scarlet TanagerCardinalidae292025-23%1997
Eastern Wood-PeweeTyrannidae282025+84%1997
American RedstartParulidae232025+100%1997
Eastern TowheePasserellidae222025-42%1997
Indigo BuntingCardinalidae222025-41%1997
Northern CardinalCardinalidae212025+6%1997
Red-winged BlackbirdIcteridae192025-32%1997
Red-bellied WoodpeckerPicidae182025-4%1997
Gray CatbirdMimidae182025-16%1997
Field SparrowPasserellidae172025+2%1997
American RobinTurdidae172025-39%1997
Tufted TitmouseParidae162025-60%1997
Mourning DoveColumbidae132025-53%1997
White-breasted NuthatchSittidae122025+21%1997
Wood ThrushTurdidae122025-55%1997
Common RavenCorvidae112025+90%1997
Hooded WarblerParulidae102025-8%1997
Northern MockingbirdMimidae92025-14%1997
Blue-gray GnatcatcherPolioptilidae92025+68%1997
Acadian FlycatcherTyrannidae82025+0%1997
Worm-eating WarblerParulidae82025+19%1997
Great Crested FlycatcherTyrannidae72025-56%1997
Eastern PhoebeTyrannidae72025+31%1997
Common GrackleIcteridae72025+53%1997
House SparrowPasseridae72025+42%1997
Cerulean WarblerParulidae62025+25%1997
Brown ThrasherMimidae62025+100%1997
Carolina WrenTroglodytidae62025+154%2000
Pileated WoodpeckerPicidae52025-72%1997
American GoldfinchFringillidae52025-29%1997
Barn SwallowHirundinidae52025-13%1997
American CrowCorvidae42025-85%1997
Cedar WaxwingBombycillidae42025+64%1997
Yellow WarblerParulidae42025-63%1997
Pine WarblerParulidae42025-59%1997
Common YellowthroatParulidae42025-58%1997
Eastern BluebirdTurdidae42025+18%1997

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