What species of bird do not push their young out of the nest?

My mom is a biology teacher and I was explaining to her how it's time for me to leave the nest like mother birds who push out their young. My mother then retorted with "there are some species that don't! Some birds don't push their young out and wait til they're ready!" Anyway, what... show more My mom is a biology teacher and I was explaining to her how it's time for me to leave the nest like mother birds who push out their young. My mother then retorted with "there are some species that don't! Some birds don't push their young out and wait til they're ready!" Anyway, what species does not push out their young? Anyone know?
5 answers 5