BirdAnalyst
BBS Route · Rhode Island · BCR 30

Block Island Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 62 species recorded across 23 survey years, still active.

62Species 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 →
23Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1987–2025Span
3Observers

Bird Species Found on Rhode Island Block Island

Top 40 of 62 species by most recent count. Each links to its species trend.

Species recorded on the Block Island 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
Great Black-backed GullLaridae89202528×1992
Red-winged BlackbirdIcteridae672025-25%1989
American RobinTurdidae602025-10%1989
Laughing GullLaridae512025n/an/a
Song SparrowPasserellidae462025-56%1989
Yellow WarblerParulidae442025+67%1989
Gray CatbirdMimidae422025-55%1989
Herring GullLaridae412025-31%1992
Common YellowthroatParulidae392025-45%1989
American GoldfinchFringillidae342025+11%1989
Eastern TowheePasserellidae302025+23%1989
Bank SwallowHirundinidae282025+537%1989
European StarlingSturnidae252025+46%1989
Cedar WaxwingBombycillidae222025+460%1989
American CrowCorvidae192025+16%1989
Mourning DoveColumbidae182025+75%1989
House SparrowPasseridae162025+767%1990
Barn SwallowHirundinidae152025+192%1989
Common GrackleIcteridae142025-40%1989
Carolina WrenTroglodytidae142025+21%1989
Northern CardinalCardinalidae132025+22%1989
Canada GooseAnatidae122025+61%1993
Brown-headed CowbirdIcteridae102025+282%1989
Fish CrowCorvidae82025+120%2004
MallardAnatidae72025+500%1992
Double-crested CormorantPhalacrocoracidae62010+180%1993
American Black DuckAnatidae42004+38%1995
House FinchFringillidae42025-81%1989
Northern House WrenTroglodytidae42025+133%1996
Blue JayCorvidae32025+8%1989
Tree SwallowHirundinidae32010-33%1989
Black-capped ChickadeeParidae32025+220%1989
Snowy EgretArdeidae32025+33%2008
Mute SwanAnatidae22008+267%1990
Northern HarrierAccipitridae22025+40%1989
White-eyed VireoVireonidae22010+100%1998
Great Blue HeronArdeidae22008+25%1999
Eastern Wood-PeweeTyrannidae21988n/an/a
Great EgretArdeidae22025+100%2001
Glossy IbisThreskiornithidae22025+0%1998

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