Rare Birds in Connecticut
Our list for Connecticut has 46 rare birds recorded regularly there: 4 residents, 5 summer visitors, 10 winter visitors, 22 passage migrants and 5 scarce visitors
Most likely in October
GBIF · Oct
Share of all bird records in Connecticut in October, 2019–2024. Each month links to that month’s page.
All 46, most common first
King EiderSomateria spectabilisPassage migrantRare46–64 cmRegularly Jan
Black-headed GullChroicocephalus ridibundusWinter visitorRare38–44 cmRegularly Dec–Mar
Long-billed DowitcherLimnodromus scolopaceusPassage migrantRare27–30 cmRegularly Aug–Nov
Rough-legged HawkButeo lagopusWinter visitorRare46–59 cmRegularly Oct–Mar
Sandhill CraneAntigone canadensisSummer visitorRare80–122 cmRegularly Mar–Dec
Ruffed GrouseBonasa umbellusSummer visitorRare41–50 cmRegularly Mar–Sep
Mourning WarblerGeothlypis philadelphiaPassage migrantRare10–15 cmRegularly May–Oct
Cattle EgretArdea ibisPassage migrantRare46–56 cmRegularly Apr–Oct
American AvocetRecurvirostra americanaPassage migrantRare43–51 cmRegularly Aug
Red-necked PhalaropePhalaropus lobatusPassage migrantRare18–19 cmRegularly Aug
Short-eared OwlAsio flammeusWinter visitorRare34–43 cmRegularly Oct–Apr
Wilson's PhalaropePhalaropus tricolorPassage migrantRare22–24 cmRegularly May
Gull-billed TernGelochelidon niloticaScarceRare33–42 cm
Upland SandpiperBartramia longicaudaPassage migrantRare28–32 cmRegularly Apr–Sep
Lark SparrowChondestes grammacusResidentRare15–17 cmRegularly Sep–Nov
Prothonotary WarblerProtonotaria citreaPassage migrantRare13–14 cmRegularly May
KittiwakeRissa tridactylaScarceRare37–41 cm
Great ShearwaterArdenna gravisScarceRare43–51 cmRegularly Jul–Aug
Greylag GooseAnser anserScarceRare75–90 cm
ChukarAlectoris chukarResidentRare32–38 cmRegularly May–Oct
Arctic JaegerStercorarius parasiticusScarceRare41–46 cm
Painted BuntingPasserina cirisPassage migrantRare12–14 cmRegularly Feb–Aug
Muscovy DuckCairina moschataResidentRare66–84 cmRegularly Mar–Dec
Data: EOD – eBird Observation Dataset (Cornell Lab of Ornithology), accessed via GBIF.org, CC BY 4.0. Records from 2019–2024, aggregated and filtered by Birdfact. How these lists are made