guillemot: small black or brown speckled auks of northern seas
auk: black-and-white short-necked web-footed diving bird of northern seas
tree fern: any of numerous usually tropical ferns having a thick woody stem or caudex and a crown of large fronds; found especially in Australia and New Zealand; chiefly of the families Cyatheaceae and Marattiaceae but some from Polypodiaceae