I have abunch of books full of pics of cooters too. and you're right! there are a bunch of different lookin cooters. I've been chasin cooter all my life.
Those that know me know I used to live in a neighborhood of elementary school boys that would find and keep turtles as a matter of prestige...and I've been chasin cooter ever since that age.
Luke, you cannot "chase" cooters. It takes patience and skill to catch cooters. Perhaps you are short of these qualities? Brady obviously knows how to catch cooters. How did you do it, Brady?