Typical weights are around 2.7 kg. Breeding locations Rockhoppers breed on more or less every sub-Antarctic Island. Nesting behaviour Nests are usually small scrapes lined with vegetation. Adults share duties during the 32 to 34 day incubation period in long shifts of typically 10 days. The male broods and guards the chicks for 24 to 26 days after hatching with the female bringing home the food for the chick.
Chicks then form into creches with both parents bringing food.
The chicks moult and leave for the sea at the age of 65 to 75 days. Bibliography Penguins John Sparks and Tony Soper, Facts on File Publications, Oxford, 1987. Penguins of the World Pauline Reilly, OUP, Oxford, 1994. The Penguins Tony D Williams, OUP, Oxford, 1995.