they breath from there lungs
...And they inhale/exhale through their beak or nose (which is the two little holes above their beak).
A Puffin
trough nose
Yes.
the baby bird is called nestling
well if that baby bird is your pet and it can nearly fly,....... no. Trust me i have a baby bird for a pet.
they become migits and when they turn to bird their feather get bigger
No, a baby bird cant, but if it is crushed it can.
The baby bird eats it. It's important fo baby birds to get nutrients, and the yolk contains the things a baby bird needs to grow proplerly.
Baby reptiles breathe air through their nostrils and their mouths into their lungs, just like adult reptiles.
Yes. When first hatched, a baby platypus can breathe on its own.
At birth, a baby has approximately 300 bones. It depends on the baby.
I would think the mom bird teachs the baby bird to fly so the baby bird knows how to fly and take care of the baby the bird will have when it grows up so it can fly and take care of itself and the baby it has if it has one ^____^.