Other groups know that when Orion first appears in the sky, dingo puppies are about to be born. When Scorpius appears, the Yolngu know that the Macassan fisherman would soon arrive to fish for sea cucumber and bring goods to trade. For the Pitjantjatjara, the rising of the Pleiades at dawn (in May) marks the start of the cool season, when some animals in the desert go into hibernation.