Gulls & Terns in Mayo
Our list for Mayo has 15 gulls & terns recorded regularly there: 5 residents, 6 summer visitors, 3 passage migrants and 1 scarce visitor
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 15, most common first
European Herring GullLarus argentatusResidentCommon55–67 cmRecorded all year
Common GullLarus canusResidentCommon40–46 cmRecorded all year
Great Black-backed GullLarus marinusResidentCommon64–79 cmRecorded all year
Lesser Black-backed GullLarus fuscusSummer visitorCommon52–64 cmRegularly Feb–Dec
Black-headed GullChroicocephalus ridibundusResidentCommon38–44 cmRecorded all year
KittiwakeRissa tridactylaSummer visitorCommon37–41 cmRegularly Feb–Oct
Sandwich TernThalasseus sandvicensisSummer visitorCommon36–41 cmRegularly Apr–Sep
Arctic TernSterna paradisaeaSummer visitorCommon33–39 cmRegularly May–Oct
Common TernSterna hirundoSummer visitorUncommon31–35 cmRegularly May–Aug
Little TernSternula albifronsSummer visitorUncommon21–25 cmRegularly May–Jul
Sabine's GullXema sabiniPassage migrantUncommon27–33 cmRegularly Aug–Sep
Iceland GullLarus glaucoidesPassage migrantUncommon52–60 cmRegularly Jan–Mar
Mediterranean GullIchthyaetus melanocephalusResidentUncommon37–40 cmRegularly Sep–Feb
Glaucous GullLarus hyperboreusPassage migrantUncommon62–68 cmRegularly Jan
Yellow-legged GullLarus michahellisScarceUncommon52–68 cm
Smallest to largest
Length, cm- Little Tern 21–25 cm
- Sabine's Gull 27–33 cm
- Common Tern 31–35 cm
- Arctic Tern 33–39 cm
- Sandwich Tern 36–41 cm
- Mediterranean Gull 37–40 cm
- Kittiwake 37–41 cm
- Black-headed Gull 38–44 cm
- Common Gull 40–46 cm
- Iceland Gull 52–60 cm
- Lesser Black-backed Gull 52–64 cm
- Yellow-legged Gull 52–68 cm
- European Herring Gull 55–67 cm
- Glaucous Gull 62–68 cm
- Great Black-backed Gull 64–79 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