Free images results:
 

Rodent pictures, stock photos and images

 
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Hamster Stock Photos
Author: Prawny
Squirrel Royalty Free Stock Photos
Author: Louddog
Chipmunk Royalty Free Stock Photos
Author: Dcrippen
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Rodent Stock Image
Author: Cookelma
Rodent Royalty Free Stock Photo
Author: Yarygin