Gulls & Terns in Monmouthshire
Our list for Monmouthshire has 5 gulls & terns recorded regularly there: 4 residents and 1 scarce visitor
Most likely in October
GBIF · OctShare of all bird records in Monmouthshire in October, 2019–2024. Each month links to that month’s page.
All 5, most common first
European Herring GullLarus argentatusResidentCommon55–67 cmRecorded all year
Lesser Black-backed GullLarus fuscusResidentCommon52–64 cmRecorded all year
Black-headed GullChroicocephalus ridibundusResidentCommon38–44 cmRecorded all year
Great Black-backed GullLarus marinusResidentUncommon64–79 cmRegularly Jul–Jan
Common GullLarus canusScarceUncommon40–46 cm
Smallest to largest
Length, cm- Black-headed Gull 38–44 cm
- Common Gull 40–46 cm
- Lesser Black-backed Gull 52–64 cm
- European Herring Gull 55–67 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