Gannets are seabirds comprising the genus Morus in the family Sulidae, closely related to boobies. Gannets are large white birds with yellowish heads, black-tipped wings and long bills. Northern gannets are the largest seabirds in the North Atlantic, having a wingspan of up to two metres (6+1⁄2 feet). The other two species occur in the temperate seas around southern Africa, southern Australia, and New Zealand. Gannets are colonial breeders on islands and coasts, normally laying one chalky-blue egg. They lack brood patches and use their webbed feet to warm the eggs. They reach maturity around 5 years of age. First-year birds are completely black, and subsequent subadult plumages show increasing amounts of white. (Source: Wikipedia.org, CC BY-SA)