Hatchlings are nestlings which have just emerged from their eggs. There is no definite time period that defines the exact ending of the hatchling period as far as I know.

The name given to a baby bird just after it has hatched.

A baby Kashra, incapable of flight.

A chick from a recently-hatched egg.

A hatchling is the dragon or firelizard that has just hatched from their egg. Finding a person to impress to and getting food from that person is the number one issue on their mind.

First stage of development. A baby bird which has not yet developed pin-feathers.

any recently hatched animal (especially birds)

young animal that comes out of an egg.

a baby bird from the moment it hatches until feathers form.

a newly hatched bird

a newborn snake.

A hatchling is the newborn of animals that develop and emerge from within hard-shell eggs. The offspring of birds are often hatched naked and with their eyes closed. The hatchling relies totally on its parents for feeding and warmth.