The Northern Gannet (Morus bassanus, formerly Sula bassana) is a seabird and is the largest member of the gannet family, Sulidae 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 81-110 cm (32-43 in) long, weigh 2.2-3.6 kg (4.8-7.9 lbs) and have a 165-180 cm (65-71 in) wingspan. Before fledging, the immature birds (at about 10 weeks of age) can weigh more than 4 kg (8.8 lbs). Their...
