BirdAnalyst
BBS Route · Connecticut · BCR 30

Greenwich Bird Survey Route

A standard 50-stop Breeding Bird Survey route. 110 species recorded across 42 survey years, still active.

110Species 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 →
42Years SurveyedYears surveyedNumber of years with at least one standard-protocol run in this geography. A longer record makes the trend more reliable.Full methodology →
1967–2018Span
10Observers

Bird Species Found on Connecticut Greenwich

Top 40 of 110 species by most recent count. Each links to its species trend.

Species recorded on the Greenwich 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
American RobinTurdidae542018-19%1969
Tufted TitmouseParidae352018+46%1969
Chipping SparrowPasserellidae332018+69%1969
Song SparrowPasserellidae312018+1%1969
Northern CardinalCardinalidae272018+18%1969
Gray CatbirdMimidae222018-12%1969
American CrowCorvidae202018-61%1969
Common GrackleIcteridae162018-75%1969
American GoldfinchFringillidae162018+175%1973
Mourning DoveColumbidae152018-63%1969
Blue JayCorvidae142018-65%1969
White-breasted NuthatchSittidae142018+30%1969
Downy WoodpeckerPicidae122018-3%1969
Black-capped ChickadeeParidae122018-27%1969
Northern House WrenTroglodytidae102018-27%1969
Brown-headed CowbirdIcteridae82018-29%1969
House SparrowPasseridae72018-75%1969
Chimney SwiftApodidae72018+180%1975
Red-eyed VireoVireonidae62018-25%1969
Eastern BluebirdTurdidae62018+25%1969
Field SparrowPasserellidae51998-59%1973
Warbling VireoVireonidae52018+200%1977
Carolina WrenTroglodytidae52018+33%1983
Baltimore OrioleIcteridae42018-88%1969
House FinchFringillidae42018-52%1969
Scarlet TanagerCardinalidae42015-47%1969
Hermit ThrushTurdidae41972n/an/a
Red-bellied WoodpeckerPicidae42018+18%1979
Barred OwlStrigidae42014n/an/a
Eastern Wood-PeweeTyrannidae32018-50%1969
Fish CrowCorvidae32018+125%1998
Red-tailed HawkAccipitridae32017+100%2007
Wood DuckAnatidae22014-33%1977
Ring-necked PheasantPhasianidae22000-80%1969
Rock PigeonColumbidae22018-81%1979
Eastern MeadowlarkIcteridae21969+0%1967
Rose-breasted GrosbeakCardinalidae22018-93%1969
Barn SwallowHirundinidae22018-58%1969
Wood ThrushTurdidae22018-93%1969
Tree SwallowHirundinidae22017+25%1976

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