Seymour is an uplifted (as opposed to volcanic) island and so is generally flat and strewn with boulders. There are good nesting sites here for a large population of magnificent frigate birds. It hosts one of the largest populations of frigate birds, with their magnificent red pouches. Blue-footed boobies perform their courtship dance in the more open area, and swallow-tailed gulls perch on the cliff edges. Despite the tremendous surf that can pound the outer shore, sea lions haul out onto the beach and can be found together with marine iguanas. Watch the beach for body-surfing sea lions.
Its name was given after an English nobleman called Lord Hugh Seymour. It has an area of 1.9 km² and a maximum altitude of 28 meters. This islet is located just north of Baltra.