Easter Sunday is a HUGE Christian holiday, in which we recall the Resurrection of Christ from the dead. It is coincidental with spring, and some would say had pagan roots, because there is a spring goddess named Eostre in Pagan tradition.
Ukrainian Book - Folk Pysanky (Easter Egg) Vira Manko
Feathers carry the same meaning as the entire bird, and this pysanka is filled with feathers. Birds were considered the harbingers of spring, thus they were a commonplace pysanka motif. Birds of all kinds are the messengers of the sun and heaven.