BirdAnalyst
BBS Route · Massachusetts · BCR 14

Sheffield Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 118 species recorded across 45 survey years, still active.

118Species 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 →
45Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1969–2022Span
4Observers

Bird Species Found on Massachusetts Sheffield

Top 40 of 118 species by most recent count. Each links to its species trend.

Species recorded on the Sheffield 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 VireoVireonidae422022+65%1971
Song SparrowPasserellidae212022-36%1971
OvenbirdParulidae192022+58%1971
American RedstartParulidae192022+103%1971
American RobinTurdidae192022-20%1971
Cedar WaxwingBombycillidae182022+126%1971
Common YellowthroatParulidae182022-17%1971
American GoldfinchFringillidae162022-32%1971
Chipping SparrowPasserellidae152022-4%1971
VeeryTurdidae152022-17%1971
Northern House WrenTroglodytidae142022-15%1971
Tufted TitmouseParidae142022+650%1976
Black-capped ChickadeeParidae122022+100%1971
Red-winged BlackbirdIcteridae112022-62%1971
Chestnut-sided WarblerParulidae102022-25%1971
Northern CardinalCardinalidae92022+50%1972
American CrowCorvidae82022+0%1971
Scarlet TanagerCardinalidae82022+5%1971
Yellow WarblerParulidae82022-15%1971
Gray CatbirdMimidae82022-9%1971
Eastern Wood-PeweeTyrannidae72022+69%1971
Least FlycatcherTyrannidae72022-4%1971
Brown-headed CowbirdIcteridae72022-19%1971
Blue-headed VireoVireonidae72022+300%1976
Yellow-bellied SapsuckerPicidae72022+208%1973
Rose-breasted GrosbeakCardinalidae62022+8%1971
European StarlingSturnidae52010-89%1971
Eastern TowheePasserellidae52022-78%1971
Blackburnian WarblerParulidae52022+100%1974
Carolina WrenTroglodytidae52022+400%2002
Blue JayCorvidae42022-63%1971
Indigo BuntingCardinalidae42022+88%1971
Wood ThrushTurdidae42022-67%1971
Downy WoodpeckerPicidae32022-46%1972
Baltimore OrioleIcteridae32022-58%1971
Swamp SparrowPasserellidae32013+233%1972
Barn SwallowHirundinidae32022-74%1971
Northern Rough-winged SwallowHirundinidae32013+20%1971
Warbling VireoVireonidae32022+150%1973
Yellow-throated VireoVireonidae32022+75%1977

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