What term refers to a chick that hatches with insulating feathers and can run or swim soon after birth?

The term for a chick that hatches with insulating feathers and is capable of running or swimming shortly after birth is "precocial." Precocial chicks are relatively mature and mobile right after hatching, allowing them to quickly adapt to their environment and evade predators. This contrasts with altricial chicks, which are born helpless and require more parental care.