BirdAnalyst
BBS Route · Vermont · BCR 13

Grand Isle Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 128 species recorded across 47 survey years, still active.

128Species 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 →
47Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2025Span
4Observers

Bird Species Found on Vermont Grand Isle

Top 40 of 128 species by most recent count. Each links to its species trend.

Species recorded on the Grand Isle 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
Ring-billed GullLaridae802025+468%1970
Red-winged BlackbirdIcteridae542025-47%1969
American CrowCorvidae312025+24%1969
Song SparrowPasserellidae232025-32%1969
American RobinTurdidae222025-48%1969
Rock PigeonColumbidae182023-36%1969
Northern CardinalCardinalidae18202518×1975
Purple MartinHirundinidae121998-33%1969
Black-capped ChickadeeParidae122025+267%1970
Common GrackleIcteridae112024-78%1969
Mourning DoveColumbidae102025+77%1969
Northern House WrenTroglodytidae102025+285%1969
Red-eyed VireoVireonidae92025+87%1969
European StarlingSturnidae82025-46%1969
BobolinkIcteridae82023-57%1969
Northern Rough-winged SwallowHirundinidae82010+300%2006
MallardAnatidae72025+700%1970
Brown-headed CowbirdIcteridae72025+260%1970
Yellow WarblerParulidae72025+106%1969
OspreyPandionidae72024+117%2000
House SparrowPasseridae62023-72%1969
Gray CatbirdMimidae62025+0%1970
White-breasted NuthatchSittidae62025+233%1970
Cliff SwallowHirundinidae61985+43%1972
Turkey VultureCathartidae62023+71%1998
Tree SwallowHirundinidae52025-7%1969
Vesper SparrowPasserellidae41987+63%1969
Warbling VireoVireonidae42024+82%1970
Chipping SparrowPasserellidae42025+200%1970
Blue-headed VireoVireonidae42025+100%1995
Brown CreeperCerthiidae41985n/an/a
Eastern KingbirdTyrannidae32024-50%1969
American GoldfinchFringillidae32025-80%1969
Savannah SparrowPasserellidae32025+200%1969
Barn SwallowHirundinidae32024-90%1969
Common YellowthroatParulidae32025-47%1969
Wood DuckAnatidae32025+9%1970
Western Cattle-EgretArdeidae31983n/an/a
Great Blue HeronArdeidae22025-60%1970
Spotted SandpiperScolopacidae22012-43%1969

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