Thats an eastern mud turtle (Kinosternon subrubrum). They are actually rather terrestrial and will frequently move on land, which is why he probably found your pond. ~Mike

That is Trachemys scripta, the Red-eared or Yellow-bellied Slider. Trachemys eggs usually hatch around 60 days after they are laid., but if it is warmer than usual they can hatch sooner.

That badger pic is really cool! I like the herp pics too, of course. I'm no turtle expert but I was thinking Yellow Mud Turtle as well even before I read Bill's reply.

Quick and easy way to differentiate a musk (sternotherus) from a mud (kinosternon) when you have them in hand is to look at the plastron - if its a tiny plastron that barely covers any of the stomach, its a musk. If it has an extensive plastron with two hinges then its a mud turtle (similar to a box turtle (although box turtles only have a single hinge). ~Mike