The bubbly structures on the dorsal sides of the digits are scutes. Birds retained them from their dinosaurian ancestors. Here is a picture of similar structures on an alligator foot:
The bubbly structures on the dorsal sides of the digits are scutes. Birds retained them from their dinosaurian ancestors. Here is a picture of similar structures on an alligator foot:
The bubbly structures on the dorsal sides of the digits are scutes. Birds retained them from their dinosaurian ancestors. Here is a picture of similar structures on an alligator foot:
The bubbly structures on the dorsal sides of the digits are scutes. Birds retained them from their dinosaurian ancestors. Here is a picture of similar structures on an alligator foot:
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