Chickens

left to right: a hen, chick, chicken coop, and rooster

Chickens are passive mobs (critters) only found on the surface of Terra.
Males are Roosters, females are Hens, and babies are chicks.

They can be captured using a Taming Collar, then Bred in a Chicken Coop, or equipped as a Pet. When in a stable and happy, hens will sometimes lay Chicken Eggs on the ground, these are not related to the production of chicks.