Free images results:
 

Tongue pictures, stock photos and images

 
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Monkey Royalty Free Stock Photos
Author: Kurt
Cockatoo Stock Images
Author: Hshart
Tooth Brush Royalty Free Stock Images
Author: Lycan
Swan chick Stock Image
Author: Mkoh
Dog Stock Images
Dog
Author: Ichtor
Dog Stock Image
Dog
Author: Ichtor
Tiger Royalty Free Stock Photography
Author: Tmcnem
Baby girl Royalty Free Stock Photos
Author: Kswope
Dog Royalty Free Stock Photos
Dog
Author: Ichtor
Dog Stock Photos
Dog
Author: Ichtor
Dog Royalty Free Stock Image
Dog
Author: Ichtor
Bull Snake Royalty Free Stock Image
Author: Bigo
Giraffe Royalty Free Stock Photos
Author: Odm
Mangy Dog Stock Photo
Author: Ichtor
 
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Also, here are some commercial RF-licensed images that match your search criteria:  
Tongue Stock Photography
Author: Maxsp