 Lihou island was identified as a " Site of Nature Conservation Importance " in 1989 , and as part of an " Important Bird Area " which includes parts of the shoreline of Guernsey . On 1 March 2006 , Lihou and the L 'Erée headland were designated a part of Guernsey 's first Ramsar wetland site , covering about 427 hectares ( 1 @,@ 060 acres ) of land and sea . This has created a marine reserve for the extensive variety of wildlife including more than 200 species of seaweed on the shores of Lihou , and more than 150 species of birds observed in the area . 
