Credit to: https://m.imgur.com/g5cSj?r
Crows are animals that will fly around in a players world. They are peacful and pretty do nothing. Sometimes, when there is a full grown crop planted on farmland (village farms or player-made), the crow will fly down to it and peck at it, causing it to break. The crow will either replant the seeds giving you a free harvest, or will fly away with your seeds, stealing your crop.
Killing them will drop 0-3 balls of XP and 0-1 feathers. They spawn in places with a light level of above 12 and will sometimes spawn near witches huts. Crows will avoid Scarecrows.