Ducks, Geese & Swans in Mayo
Our list for Mayo has 26 ducks, geese & swans recorded regularly there: 4 residents, 13 winter visitors, 7 passage migrants and 2 scarce visitors
Most likely in October
GBIF · OctShare of all bird records in Mayo in October, 2019–2024. Each month links to that month’s page.
All 26, most common first
MallardAnas platyrhynchosResidentCommon50–65 cmRecorded all year
Eurasian TealAnas creccaWinter visitorCommon34–38 cmRegularly Sep–May
Eurasian WigeonMareca penelopeWinter visitorCommon42–51 cmRegularly Sep–Apr
Whooper SwanCygnus cygnusWinter visitorCommon140–165 cmRegularly Oct–Jun
Mute SwanCygnus olorResidentCommon140–160 cmRecorded all year
Tufted DuckAythya fuligulaWinter visitorCommon40–47 cmRegularly Jul–May
Red-breasted MerganserMergus serratorWinter visitorCommon52–58 cmRegularly Sep–May
Greylag GooseAnser anserWinter visitorCommon75–90 cmRegularly Aug–Jun
Barnacle GooseBranta leucopsisWinter visitorCommon58–70 cmRegularly Oct–Mar
Brent GooseBranta berniclaWinter visitorCommon55–66 cmRegularly Sep–Apr
Common ScoterMelanitta nigraWinter visitorCommon43–54 cmRegularly Aug–May
Northern ShovelerSpatula clypeataWinter visitorCommon44–51 cmRegularly Sep–May
GoldeneyeBucephala clangulaWinter visitorCommon40–51 cmRegularly Nov–Mar
Common ShelduckTadorna tadornaResidentUncommon58–67 cmRegularly Jan–Jun
GadwallMareca streperaWinter visitorUncommon46–56 cmRegularly Oct–May
PochardAythya ferinaWinter visitorUncommon42–49 cmRegularly Nov–Feb
Long-tailed DuckClangula hyemalisPassage migrantUncommon37–60 cmRegularly Jan–Feb
EiderSomateria mollissimaPassage migrantUncommon50–71 cmRegularly Feb–Jun
Pink-footed GooseAnser brachyrhynchusPassage migrantUncommon60–75 cmRegularly Sep–Feb
Cackling GooseBranta hutchinsiiScarceUncommon53–76 cmRegularly Mar
Greater ScaupAythya marilaPassage migrantUncommon39–56 cmRegularly Nov
American Black DuckAnas rubripesPassage migrantUncommon54–59 cmRegularly Feb–Sep
Common MerganserMergus merganserPassage migrantUncommon58–68 cmRegularly Jan
Smallest to largest
Length, cm- Eurasian Teal 34–38 cm
- Tufted Duck 40–47 cm
- Goldeneye 40–51 cm
- Pochard 42–49 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
- American Black Duck 54–59 cm
- Mallard 50–65 cm
- Brent Goose 55–66 cm
- Eider 50–71 cm
- Common Shelduck 58–67 cm
- Common Merganser 58–68 cm
- Barnacle Goose 58–70 cm
- Cackling Goose 53–76 cm
- Pink-footed Goose 60–75 cm
- Northern Pintail 59–76 cm
- Greater White-fronted Goose 64–81 cm
- Greylag Goose 75–90 cm
- Canada Goose 76–110 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