This is a video about a common gull in Sweden; (unusually) nesting in a tree instead of on the ground.
This spring, gulls’ nests were counted in the Dune Park, near Ecomare museum on Texel island in the Netherlands.
The estimated numbers: 136 herring gulls‘ nests, 13 lesser black-backed gulls‘ nests, 189 common gulls‘ nests.
Herring gull and lesser black-backed gull nests on Texel: here. And here.
Population dynamics in lesser black-backed gulls in the Netherlands support a North Sea regime shift: here.