Nest usually on some open, flat area, March - October. A shallow scrape is made, sometimes lined with a little grass. Eggs 1- 2 with a basic off-white colour, light turquoise or pale pinkish marked with brown splotches.
Immature has yellow bill, black-and-white barred upper-parts with buff-edged feathers - quite a mottled plumage. The sexes are alike.
A large Tern, with large, slightly curved, yellow bill. Forehead strip, sides of face, neck and underparts white. Black legs and feet with yellow soles.
Common in the south western Cape and to be found usually in small parties along the coast, or at estuaries. Breed on Schaapen, Marcus, Dyer, Malgas, Meeuw and Robben Islands, but not on each island every year.