Well from looking at the pic I can't tell what it is. Maybe a tail who knows. I do know that I have personally captured quite a few from Michigan waterways. People let em loose alot. If you knew how many times cities have asked me to sign confidentiality papers concerning crocs, you would be surprised.
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2 A. Miss at 8'
5 A. Miss at 3'-5'
1 C. Nil at 9'
1 C. Croc at 6.5'
and
6 A. Miss/C. Croc 2'-3'