In 2002, two pure pairs of Yellow-legged Gull Larus [cachinnans] michahellis were found breeding in the outer harbour of Zeebrugge (51°21’N, 3°11’E), Belgium. These are the first pure pairs breeding along the North Sea coast. Pellets found in the vicinity of the nests suggest that the diet of their chicks consisted of fish and young rabbits. Both pairs fledged two chicks.

Atlantic seabirds

CC BY 3.0 NL ("Naamsvermelding")

Nederlandse Zeevogelgroep

Harry J.P. Vercruijsse, Eric W.M. Stienen, & Jeroen van Waeyenberge. (2002). First pure pairs of Yellow—legged Gull Larus [cachinnans] michahellis along the North Sea coasts. Atlantic seabirds, 4(3), 127–129.