The Easter Bunny (also called the Easter Rabbit or Easter Hare) is a folkloric figure and symbol of Easter, depicted as a rabbit bringing Easter eggs. Originating among German Lutherans, the "Easter Hare" originally played the role of a judge, evaluating whether children were good or disobedient in behavior at the start of the season of Eastertide. The Easter Bunny is sometimes depicted with clothes.
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The hare was a popular motif in medieval church art. In ancient times, it was widely believed (as by Pliny, Plutarch, Philostratus, and Aelian) that the hare was a hermaphrodite. The idea that a hare could reproduce without loss of virginity led to an association with the Virgin Mary, with hares sometimes occurring in illuminated manuscripts and Northern European paintings of the Virgin and Christ Child. [...] Eggs, like rabbits and hares, are fertility symbols of antiquity. Since birds lay eggs and rabbits and hares give birth to large litters in the early spring, these became symbols of the rising fertility of the earth [...]
Rabbits and hares are both prolific breeders. Female hares can conceive a second litter of offspring while still pregnant with the first. This phenomenon is known as superfetation. Lagomorphs mature sexually at an early age and can give birth to several litters a year (hence the saying, "to breed like rabbits" or "to breed like bunnies"). It is therefore not surprising that rabbits and hares should become fertility symbols, or that their springtime mating antics should enter into Easter folklore.
In addition, Orthodox churches have a custom of abstaining from eggs during the fast of Lent. The only way to keep them from being wasted was to boil or roast them, and begin eating them to break the fast. As a special dish, they would probably have been decorated as part of the celebrations. Later, German Protestants retained the custom of eating colored eggs for Easter, though they did not continue the tradition of fasting. [...] Many Christians of the Eastern Orthodox Church to this day typically dye their Easter eggs red, the color of blood [...]
The idea of an egg-giving hare went to the U.S. in the 18th century. Protestant German immigrants in the Pennsylvania Dutch area told their children about the "Osterhase" (sometimes spelled "Oschter Haws"). Hase means "hare", not rabbit.