Every one in the world knows birds lay eggs.   Specifically  they lay amniotes eggs with calcified shells.   Birds keep there  eggs warm until they hatch.  Some  species of birds are helpless and naked at birth and their parents have to  feed them. These birds  are know as antiracial.  Look  at  the  following  websites  for  more  information  about  birds.

WEBSITES

http://www.ucmp.berkley.edu/diapsids/birds/birdintro.html

http://www.birds.cornell.edu/

http://www.enchantedlearning.com/subjects/birds/printouts/

http://earthlife.net/birds/intro.html

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