The Boschplaat is a nature reserve in the east of Terschelling island in the northern Netherlands.
From Dutch Staatsbosbeheer:
There are five gull species: Black headed gull, Common gull, Herring gull, Great black backed gull and Lesser black backed gull, of which the last named species with about 14,000 couples is by far the most numerous. …
The number of couples of the Little egret, of which 4 tot 6 pairs bred this year, increases slowly. ….
Also the Kentish plover and the Ringed plover had chicks successfully this year.
Great white egrets in The Netherlands: here.