African penguin
Its diet may also include the eggs of seafowl. At Robben Island, mole snakes were observed eating the eggs of "Spheniscus demersus" (African penguin), "Larus hartlaubii" (Harlaub's gull), and "Numida meleagris" (helmeted guinea-fowl). Juveniles were observed eating "Strongylopus grayii" (clicking stream frogs).