The bird family Sulidae comprises the gannets and boobies. Collectively called sulids, they are medium-large coastal seabirds that plunge-dive for fish and similar prey. The 10 species in this family are often considered congeneric in older sources, placing all in the genus Sula. However, Sula and Morus (gannets) can be readily distinguished by morphological, behavioral, and DNA sequence characters. Abbott's booby (Papasula) is given its own genus, as it stands apart from both in these respects. It appears to be a distinct and ancient lineage, maybe closer to the gannets than to the true boobies.
Sulidae
Blue-footed booby (Sula nebouxii) with distinctive colouring and bill.
Northern gannet (Morus bassanus) preparing to land
A blue-footed booby (Sula nebouxii) incubating its eggs
Gannets are seabirds comprising the genus Morus in the family Sulidae, closely related to boobies.
Gannet
Nesting gannets (Morus serrator) at the Cape Kidnappers colony in New Zealand
A northern gannet in Bonaventure Island's colony
Gannet, Bempton Cliffs, Yorkshire