BirdAnalyst
BBS Route · Maryland · BCR 28

Vindex Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 123 species recorded across 58 survey years, still active.

123Species 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
6Observers

Bird Species Found on Maryland Vindex

Top 40 of 123 species by most recent count. Each links to its species trend.

Species recorded on the Vindex 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
American CrowCorvidae362024+65%1968
Red-eyed VireoVireonidae252024-18%1968
American RobinTurdidae252024-48%1968
Red-winged BlackbirdIcteridae242024-68%1968
Mourning DoveColumbidae182024+933%1969
Common RavenCorvidae15202412×1974
Gray CatbirdMimidae112024-21%1968
Song SparrowPasserellidae92024-18%1968
Scarlet TanagerCardinalidae92024-65%1968
American GoldfinchFringillidae72024-48%1968
Eastern TowheePasserellidae72024-79%1968
Common YellowthroatParulidae72024+3%1968
Indigo BuntingCardinalidae62024-72%1968
Northern House WrenTroglodytidae62024-6%1968
European StarlingSturnidae52024-76%1968
Chestnut-sided WarblerParulidae52024-35%1968
Black-capped ChickadeeParidae52024-52%1968
MallardAnatidae52008+275%1979
Blue JayCorvidae42024+50%1968
Chipping SparrowPasserellidae42024-65%1968
Northern CardinalCardinalidae42024+60%1968
Cedar WaxwingBombycillidae42023-56%1968
OvenbirdParulidae42024-50%1968
Turkey VultureCathartidae42024+567%1996
Tree SwallowHirundinidae42022+50%1980
Baltimore OrioleIcteridae32023-36%1968
Field SparrowPasserellidae32023-80%1968
Blue-headed VireoVireonidae32024+200%1968
Black-throated Green WarblerParulidae32019+167%1968
American RedstartParulidae32024-69%1968
Brown ThrasherMimidae32024-55%1968
Tufted TitmouseParidae32024+0%1968
White-breasted NuthatchSittidae32023-17%1970
Chimney SwiftApodidae32022-14%1979
Wood DuckAnatidae31996+200%1984
Canada GooseAnatidae32021+144%1999
KilldeerCharadriidae22024-73%1968
Downy WoodpeckerPicidae22022-38%1968
Pileated WoodpeckerPicidae22024+200%1972
Red-headed WoodpeckerPicidae22024+33%1986

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