Sub-category: Boobies & Gannets
Young birds are dark brown in their first year, and gradually acquire more white in subsequent seasons until they reach maturity after five years. Adults are 32 to 43 inches long and have a 65 to 71 inch wingspan. Their plumage is white with black wing tips. The bill is light bluish. The eye is light blue, and it is surrounded by bare, black skin. During breeding, the head and neck are brushed in a delicate yellow.
They normally nest in large colonies, on cliffs overlooking the ocean or on small rocky islands.