ミヤコドリ
The largest colony of Sandwich terns in Western Europe can be found on Griend: every year, around 10,000 pairs breed on the island. Among others, the common tern, Arctic tern, common eider, common shelduck, Eurasian oystercatcher, common redshank, and occasionally the short-eared owl also breed on the island. During the building of the sand dike, the island was colonized by the wood mouse.