BirdAnalyst
BBS Route · Vermont · BCR 14

Middlesex Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 130 species recorded across 54 survey years, still active.

130Species 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 →
54Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1968–2025Span
4Observers

Bird Species Found on Vermont Middlesex

Top 40 of 130 species by most recent count. Each links to its species trend.

Species recorded on the Middlesex 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 VireoVireonidae592025+30%1970
OvenbirdParulidae382025+850%1970
Song SparrowPasserellidae362025-28%1970
Common YellowthroatParulidae352025+32%1970
American RobinTurdidae292025-34%1970
Red-winged BlackbirdIcteridae242025-66%1970
Black-capped ChickadeeParidae232025+19%1970
American CrowCorvidae222025+98%1970
Chestnut-sided WarblerParulidae192025+109%1970
Eastern PhoebeTyrannidae122025+200%1970
Alder FlycatcherTyrannidae122025+142%1970
Blue JayCorvidae122025+10%1970
Northern ParulaParulidae122025+800%1971
Northern House WrenTroglodytidae112025+157%1974
Common GrackleIcteridae102025+92%1970
American GoldfinchFringillidae102025-47%1970
Cedar WaxwingBombycillidae102025+91%1970
VeeryTurdidae102025-19%1970
Hermit ThrushTurdidae102025-58%1970
Yellow-bellied SapsuckerPicidae92025+525%1970
Chipping SparrowPasserellidae82025-46%1970
White-throated SparrowPasserellidae72025-67%1970
Indigo BuntingCardinalidae72025+143%1970
Black-throated Green WarblerParulidae72025+144%1971
Northern Rough-winged SwallowHirundinidae71986+200%1977
Blackburnian WarblerParulidae62025+350%1970
Gray CatbirdMimidae62025+0%1970
Mourning DoveColumbidae62025+575%1972
Hairy WoodpeckerPicidae62025+200%1972
Winter WrenTroglodytidae62025+50%1971
MallardAnatidae62025+433%2010
BobolinkIcteridae52025-7%1970
Savannah SparrowPasserellidae52025+275%1970
Least FlycatcherTyrannidae42025+300%1971
Swamp SparrowPasserellidae42025-31%1970
Black-and-white WarblerParulidae42025+17%1970
Purple FinchFringillidae42025-53%1971
Pine WarblerParulidae42025+333%2018
Double-crested CormorantPhalacrocoracidae42011n/an/a
Red CrossbillFringillidae42018n/an/a

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