The bunny is associated with Easter primarily because it symbolizes fertility and new life, themes that are central to spring and the Easter season. This connection originates from pagan traditions where rabbits and hares, known for their prolific breeding, symbolized fertility and renewal. The Easter Bunny tradition likely began in 8th century Britain, where early Christians merged their customs with celebrations of the pagan goddess Eostre, who was associated with spring and fertility and for whom the hare was a sacred animal. Over time, German immigrants brought the tale of the egg-laying Easter Hare ("Osterhase") to America in the 18th century, and this evolved into the modern Easter Bunny delivering eggs and treats to children, symbolizing joy, renewal, and new beginnings during Easter.

The practice of the Easter Bunny delivering eggs may seem odd since rabbits do not lay eggs. However, eggs also symbolize fertility, rebirth, and new life — themes that align closely with the bunny's symbolism. Eggs were a significant part of spring celebrations and were linked with the resurrection of Jesus in Christian traditions. The merging of these symbols—bunnies and eggs—reflects an amalgamation of older pagan fertility rites with Christian Easter celebrations.