First Winter (Basic I) Plumage: Mostly white, with dark blackish brown face. Back covered in blackish brown spots. Tail tip and tips of flight feathers black. Bill all dark. First Summer (Alternate II) Plumage: Mostly white, with fewer dark spots, less blackish on face.
"Masked booby" has been designated the official name by the International Ornithologists' Union (IOC). It has also been called masked gannet, blue-faced booby, white booby (for its plumage), and whistling booby (for its distinctive call). The masked booby is one of six species of booby in the genus Sula.
Swifts are small birds which spend the majority of their lives flying. These birds have very short legs and never settle voluntarily on the ground, perching instead only on vertical surfaces. Many swifts have long swept-back wings which resemble a crescent or boomerang. There are 18 species which have been recorded in the Philippines.