When does a Royal Penguin chick's vulnerability shift during the nesting phase?

Answer

When they gather in the 'crèche' stage while both parents forage.

When chicks enter the crèche stage, they are less attended to individually as both parents forage, which increases the success rate for opportunistic aerial hunters.

When does a Royal Penguin chick's vulnerability shift during the nesting phase?
Predatoranimalwildlifepenguinroyal penguin