They could have gave them some more unique abilities. Also, those eyes were totally wrong.
[video=youtube;YgX7cBNiHIo]https://www.youtube.com/watch?v=YgX7cBNiHIo[/video]
[video=youtube;YgX7cBNiHIo]https://www.youtube.com/watch?v=YgX7cBNiHIo[/video]