In addition to the obvious symbology of the fertile rabbit as a harbinger of spring, pagan mythology offers the following:
The ancient belief that by eating something we take on its characteristics formed the basis for the earliest “blessings” before meals (a way to honor the life that had been sacrificed so that we as humans could enjoy life) and, presumably, for the more recent Christian sacrament of communion as well.
The Goddess Ostara and the Easter Bunny
Feeling guilty about arriving late one spring, the Goddess Ostara saved the life of a poor bird whose wings had been frozen by the snow. She made him her pet or, as some versions have it, her lover. Filled with compassion for him since he could no longer fly (in some versions, it was because she wished to amuse a group of young children), Ostara turned him into a snow hare and gave him the gift of being able to run with incredible speed so he could protect himself from hunters.
In remembrance of his earlier form as a bird, she also gave him the ability to lay eggs (in all the colors of the rainbow, no less), but only on one day out of each year.
Eventually, the hare managed to anger the goddess Ostara, and she cast him into the skies where he would remain as the constellation Lepus (The Hare) forever positioned under the feet of the constellation Orion (the Hunter). He was allowed to return to earth once each year, but only to give away his eggs to the children attending the Ostara festivals that were held each spring. The tradition of the Easter Bunny had begun.