Many of the diffs are almost perpendicular to the sea. The landform is dangerous and is not to climb. Most of the Nordmann's terns build their nests in the crevices resembling apartments with each bird having its own secure abode.
島上多處岩壁與海平面幾乎成垂直，地形險峻，不易攀登，燕鷗大多在岩壁的空隙中築巢，一格格像是公寓房子似地，每隻鳥擁有自己安全的窩。