The egg. Final answer. As the geneticist J. B. S. Haldane remarked, "The most frequently asked question is: 'Which came first, the chicken or the egg?' The fact that it is still asked proves either that many people have never been taught the theory of evolution or that they don't believe it." With that in mind, the answer becomes obvious. Bird evolved from reptiles, so the first bird must have come out of an egg--laid by a reptile. http://www.huffingtonpost.com/2011/...l?ncid=webmail8#s375327&title=What_came_first Well there it is. Simple. Once again, I hate to say "I told you so," but I told you so.