Ducks, Geese & Swans in Gwynedd
Our list for Gwynedd has 22 ducks, geese & swans recorded regularly there: 5 residents, 2 summer visitors, 9 winter visitors, 3 passage migrants and 3 scarce visitors
Most likely in October
GBIF · OctShare of all bird records in Gwynedd in October, 2019–2024. Each month links to that month’s page.
All 22, most common first
MallardAnas platyrhynchosResidentCommon50–65 cmRecorded all year
Common ShelduckTadorna tadornaResidentCommon58–67 cmRecorded all year
Eurasian WigeonMareca penelopeWinter visitorCommon42–51 cmRegularly Sep–Mar
GoldeneyeBucephala clangulaWinter visitorCommon40–51 cmRegularly Oct–Apr
Mute SwanCygnus olorResidentCommon140–160 cmRecorded all year
Canada GooseBranta canadensisResidentCommon76–110 cmRecorded all year
Red-breasted MerganserMergus serratorWinter visitorCommon52–58 cmRecorded all year
Eurasian TealAnas creccaWinter visitorCommon34–38 cmRegularly Aug–Apr
Common MerganserMergus merganserResidentCommon58–68 cmRecorded all year
Greylag GooseAnser anserWinter visitorCommon75–90 cmRegularly Dec–Oct
Northern PintailAnas acutaWinter visitorCommon59–76 cmRegularly Sep–Feb
Brent GooseBranta berniclaWinter visitorCommon55–66 cmRegularly Sep–Apr
EiderSomateria mollissimaSummer visitorCommon50–71 cmRegularly Jan–Nov
Common ScoterMelanitta nigraSummer visitorUncommon43–54 cmRegularly Jan–Nov
Northern ShovelerSpatula clypeataWinter visitorUncommon44–51 cmRegularly Nov–Apr
Tufted DuckAythya fuligulaWinter visitorUncommon40–47 cmRegularly May–Feb
GadwallMareca streperaScarceUncommon46–56 cm
Greater ScaupAythya marilaPassage migrantUncommon39–56 cmRegularly Nov
Whooper SwanCygnus cygnusPassage migrantUncommon140–165 cmRegularly Oct–Mar
Long-tailed DuckClangula hyemalisPassage migrantUncommon37–60 cmRegularly Mar
Black SwanCygnus atratusScarceUncommon110–142 cmRegularly Jul
Pink-footed GooseAnser brachyrhynchusScarceUncommon60–75 cm
Smallest to largest
Length, cm- Eurasian Teal 34–38 cm
- Tufted Duck 40–47 cm
- Goldeneye 40–51 cm
- Eurasian Wigeon 42–51 cm
- Northern Shoveler 44–51 cm
- Greater Scaup 39–56 cm
- Common Scoter 43–54 cm
- Long-tailed Duck 37–60 cm
- Gadwall 46–56 cm
- Red-breasted Merganser 52–58 cm
- Mallard 50–65 cm
- Brent Goose 55–66 cm
- Eider 50–71 cm
- Common Shelduck 58–67 cm
- Common Merganser 58–68 cm
- Northern Pintail 59–76 cm
- Pink-footed Goose 60–75 cm
- Greylag Goose 75–90 cm
- Canada Goose 76–110 cm
- Black Swan 110–142 cm
- Mute Swan 140–160 cm
- Whooper Swan 140–165 cm
Body length, bill to tail. Rare birds in grey.
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