BirdAnalyst
BBS Route · Vermont · BCR 14

Marlboro Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 30 survey years, still active.

110Species 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 →
30Years 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
3Observers

Bird Species Found on Vermont Marlboro

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Marlboro 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 VireoVireonidae712024+182%1968
OvenbirdParulidae472024+65%1968
American RobinTurdidae412024+5%1968
Chipping SparrowPasserellidae272024+210%1968
Song SparrowPasserellidae252024+7%1968
Tufted TitmouseParidae192024+342%1990
American RedstartParulidae182024+143%1968
Pine WarblerParulidae182024+250%2016
Common YellowthroatParulidae172024+195%1968
Chestnut-sided WarblerParulidae152024+46%1968
Black-capped ChickadeeParidae152024+65%1968
Yellow-bellied SapsuckerPicidae132024+325%1968
American GoldfinchFringillidae122024+50%1968
Scarlet TanagerCardinalidae122024+11%1968
Black-and-white WarblerParulidae112024+540%1968
House SparrowPasseridae112024+110%1968
Mourning DoveColumbidae112024+500%1969
Cedar WaxwingBombycillidae102024+250%1968
Gray CatbirdMimidae102024+17%1968
Blue-headed VireoVireonidae92024+700%1973
Eastern PhoebeTyrannidae82024-19%1968
Least FlycatcherTyrannidae82024-17%1968
Brown-headed CowbirdIcteridae82024-7%1970
Black-throated Green WarblerParulidae82024+182%1968
VeeryTurdidae82024-63%1968
American CrowCorvidae72024+13%1968
Barn SwallowHirundinidae72024-23%1968
Chimney SwiftApodidae62024+25%1968
Blue JayCorvidae62024-32%1968
Red-winged BlackbirdIcteridae62024-62%1968
Winter WrenTroglodytidae62024+380%1968
House FinchFringillidae62024+38%1989
Brown CreeperCerthiidae62024+114%1991
European StarlingSturnidae52024-71%1968
White-breasted NuthatchSittidae52024+217%1969
Wood ThrushTurdidae52024-84%1968
Black-throated Blue WarblerParulidae52024+667%1969
Blackburnian WarblerParulidae52024+525%1978
Eastern Wood-PeweeTyrannidae42024+10%1968
Northern House WrenTroglodytidae42024+500%1968

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