Blue-footed BoobySula nebouxii
32-34" (81-86 cm). Large seabird with long pointed bill, wings, and tail. Head and neck pale, streaked brown. Wings, back, and tail dark brown; white patches on nape and rump; underparts white. Legs and feet bright blue. Back and rump of immatures slightly mottled. Brown Booby lacks white patches on nape and rump; its feet are yellow or greenish yellow.