Free images results:
 

Ugly pictures, stock photos and images

 
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Bug #2 Royalty Free Stock Photos
Author: Smitea
Ostrich Stock Image
Author: Kiankhoon
Hippo. Royalty Free Stock Photo
Author: Jameshearn
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Ugly pig Stock Images
Author: Quayside
Ugly Pig Royalty Free Stock Photo
Author: Stelya
Ugly Bird Stock Images
Author: Iorboaz