Lepus, the hare:

An ancient constellation that has traditionally been pictured as a hare or rabbit. The constellation lies under the feet of Orion, so in mythology Lepus is usually being hunted by Orion. Another story tells of how Lepus was once a bird who was changed into a hare by Ostara, the Goddess of Spring. Once a year the hare was allowed to lay eggs, this is the origin of the Easter Bunny. The word Easter is derived from Ostara (Ostern in German).