Frogs that spawn in water appear to sit on their nest while they are laying their eggs. Frogs that spawn in damp leaf litter may sit on the clutch to protect them.
It is a bird. A bird hatches from an egg.
Emperor Penguin The Emperor Penguin
A bird egg is hatched by heating, or incubating it and waiting until the chick hatches. The time it takes to hatch varies from species to species.
The mother hatches an egg The mother lays the eggs, sits on them to keep them warm while incubating, then feeds them when they hatch out.
I think the word you are looking for is - an egg!
It either hatches and a baby bird comes out, or the egg rots.
Until the egg hatches.
The egg yolk nourishes the chick until it hatches.
wait until it hatches. then you will know
to keep the egg warm, and to protect it.
incubator
The two parent flamingos mate. Then, the baby developes inside the mother bird. Then,the embryo comes out of the mother in a big, hard egg. The mother then guards the nest until the little, fluffy white baby hatches.