A chick?
great
Newly hatched insects are generally called crawlers.
no
A fry
alevin
Well, baby chickens are yellow, but most birds are just grey when yhey are newly hatched.
Newly hatched ducklings actually do not have feathers.
Kiwi
Snakelet, neonate (a newly-born snake), hatchling (a newly-hatched snake)
A newly hatched cockroach is called a nymph.
A newly born or hatched fish is a fry.
Newly hatched birds usually look raw, wet, and floppy.