Common differences are size and color.
It depends what bird it is. Some eggs are white, some are blue and some can be pale green.
with a cow egg
(=^) bird in egg =^ bird not in egg(=eyes ^beak)
the koels eggs color is black and white. by shalin and duleen weeraratne
yes, because it has grown into a bird in the egg
The cow bird. The cow bird lays it's eggs in another birds nest, and then when the cow bird's eggs begin to hatch, the baby cow birds will push the other birds out of the nest.
Cow is to mammal as pigeon is to bird.
The egg hatches in a matter of hours, and a chicken-cow hybrid emerges from the broken shell.
Air+Lizard= Bird
All species of Birds are born alive in the egg! The only bird born NOT in an egg is a DEAD bird! All birds are born in an egg.
The ostrich lays the largest eggs of all birds.