Common Snapping Turtle (yearling)

Common Snapping Turtle (4 months old)

Common Snapping Turtle - 8 months of growth difference

Alligator Snapping Turtle (ca. 6 months old)

Alligator Snapping Turtle (annoyed)

False Map Turtle Male (note elongated front claws)
 
 

False Map Turtle Male (elongated front claws and enlarged tail)