BirdAnalyst
BBS Route · Rhode Island · BCR 30

Block Island Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 60 species recorded across 22 survey years, still active.

60Species 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 →
22Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1987–2010Span
2Observers

Bird Species Found on Rhode Island Block Island

Top 40 of 60 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
Herring GullLaridae1412010-16%1992
American RobinTurdidae1012010-1%1989
American CrowCorvidae912010+59%1989
Common GrackleIcteridae842010-28%1989
Great Black-backed GullLaridae83201030×1992
European StarlingSturnidae742010+64%1989
Bank SwallowHirundinidae502010+584%1989
Red-winged BlackbirdIcteridae422010-40%1989
Canada GooseAnatidae412010+84%1993
Song SparrowPasserellidae362010-59%1989
Gray CatbirdMimidae362010-56%1989
House SparrowPasseridae342010+800%1990
Northern CardinalCardinalidae292010+48%1989
Brown-headed CowbirdIcteridae272010+359%1989
Carolina WrenTroglodytidae252010+34%1989
Common YellowthroatParulidae222010-50%1989
Eastern TowheePasserellidae202010+7%1989
Black-capped ChickadeeParidae192010+290%1989
Mourning DoveColumbidae172010+54%1989
Yellow WarblerParulidae152010-2%1989
Ring-necked PheasantPhasianidae122010-67%1989
American GoldfinchFringillidae112010-30%1989
Barn SwallowHirundinidae92010+154%1989
MallardAnatidae82010+425%1992
Double-crested CormorantPhalacrocoracidae62010+180%1993
Blue JayCorvidae52010+17%1989
American Black DuckAnatidae42004+38%1995
House FinchFringillidae42010-85%1989
Great EgretArdeidae42010+75%2001
Tree SwallowHirundinidae32010-33%1989
Cedar WaxwingBombycillidae32010+140%1989
Northern MockingbirdMimidae32010+75%1991
Fish CrowCorvidae32010+40%2004
Mute SwanAnatidae22008+267%1990
Northern HarrierAccipitridae22010+100%1989
Eastern KingbirdTyrannidae22010-42%1989
White-eyed VireoVireonidae22010+100%1998
Great Blue HeronArdeidae22008+25%1999
Eastern Wood-PeweeTyrannidae21988n/an/a
Northern House WrenTroglodytidae22007+67%1996

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