 While the definition of seabirds suggests that the birds in question spend their lives on the ocean, many seabird families have many species that spend some or even most of their lives inland away from the sea.Most strikingly, many species breed tens, hundreds or even thousands of miles inland.Some of these species still return to the ocean to feed; for example, the snow petrel, the nests of which have been found inland on the Antarctic mainland, are unlikely to find anything to eat around their breeding sites.