Ida and Adrasteia were nymphs of Mount Ida in Krete who were entrusted with the care of the infant god Zeus. They hid him away in the secluded Diktaion cave, nursing him with honey and the milk of the she-goat Amaltheia, while the Kouretes masked his cry with their shield-clashing dance. As a reward for their service, Zeus placed the pair in the heavens as the constellations Ursa Major and Minor (the two Bears), along with the goat Amaltheia as Capra. These constellations were also known as Helike (the Circling One), Ursa Major, and Kynosoura (the Dog's Tail), Ursa Minor. The latter because it appeared to be the tail of the adjacent star-group Canis Major.
They were perhaps the same as the Meliai ("Honey" Nymphs) described by Hesiod as being born from the blood of the castrated Ouranos. Amaltheia was sometimes described as the third nymph nurse, though in most accounts she was the milk-supplying goat.