Free images results:
 

Lamb pictures, stock photos and images

 
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The Lamb Stock Images
Author: Marilyna
Lamb Stock Image
Author: Sloth92
Lamb Muflon Stock Images
Author: Odm
Sheep Royalty Free Stock Image
Author: Monkie
Running sheep Royalty Free Stock Photo
Author: Rud
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Lamb Royalty Free Stock Photography
Author: Eriklam
Lamb Royalty Free Stock Photography
Author: Churchmouse
Lamb Royalty Free Stock Images
Author: Njmcc