Emus and other "prehistoric" birds, (called ratites) are an important part
of the anti-evolution controversy that is still being perpetuated
exclusively for religious reasons of course. 
The exact evolutionary origin of ratites is still being researched.
But the ancestry of all aves within dinosauria is fairly certain. 

Are birds descended from dinosaurs? 
How sound or profound is the evidence of that?
On the [highly disputed] Origin of [bird] Species
Did they come from some Jurassic park?
Or from their own Adam and Ave?
Click here for moa
This site was created with a template that may not show the text at the proper size. 
For Internet Exploder users, go to VIEW and TEXT SIZE to select MEDIUM.