Easter Customs….
n“The origin of the Easter egg is based on the fertility lore of the Indo-European races ... The Easter bunny had its origin in pre-Christian fertility lore. Hare and rabbit were the most fertile animals our fore-fathers knew, serving as symbols of abundant new life in the spring season” 

  - Francis Weiser, professor of philosophy
  at Boston College, Handbook of Christian   Feasts and Customs, 1958 , pp. 233, 236.