Free images results:
 

Martians pictures, stock photos and images

 
1


 
 
1


 
Also, here are some commercial RF-licensed images that match your search criteria:  
Martians Royalty Free Stock Image
Author: Cthoman
Aliens Royalty Free Stock Photo
Author: Icefields
Aliens Royalty Free Stock Photo
Author: V.e.r.i.k