One species has been recorded in Maryland. Order: SuliformesFamily: Sulidae  The sulids comprise the gannets and boobies. Both groups are medium-large coastal seabirds that plunge-dive for fish. Three species have been recorded in Maryland. Order: SuliformesFamily: Phalacrocoracidae  Cormorants are medium-to-large aquatic birds, usually with mainly dark plumage and areas of colored skin on the face. The bill is long, thin, and sharply hooked. Their feet are four-toed and webbed. Three species have been recorded in Maryland. Order: SuliformesFamily: Anhingidae  Darters and anhingas are cormorant-like water birds with long necks and long, straight beaks. They are fish eaters which often swim with only their neck above the water. One species has been recorded in Maryland. Order: PelecaniformesFamily: Pelecanidae  Pelicans are large water birds with a distinctive pouch under their beak. Like other birds in the order Pelecaniformes, they have four webbed toes. Two species have been recorded in Maryland. Order: PelecaniformesFamily: Ardeidae  The family Ardeidae contains the herons, egrets, and bitterns. Herons and egrets are medium to large wading birds with long necks and legs. Bitterns tend to be shorter-necked and more secretive. Members of Ardeidae fly with their necks retracted, unlike other long-necked birds such as storks, ibises, and spoonbills. Twelve species have been recorded in Maryland. Order: PelecaniformesFamily: Threskiornithidae  The family Threskiornithidae includes the ibises and spoonbills. They have long, broad wings. Their bodies tend to be elongated, the neck more so, with rather long legs. The bill is also long, decurved in the case of the ibises, straight and distinctively flattened in the spoonbills. Four species have been recorded in Maryland. Order: CathartiformesFamily: Cathartidae  The New World vultures are not closely related to Old World vultures, but superficially resemble them because of convergent evolution. Like the Old World vultures, they are scavengers. However, unlike Old World vultures, which find carcasses by sight, New World vultures have a good sense of smell with which they locate carcasses.