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.

Looks like a wood turtle. Protected in many parts of it's range. Local DNR might even want to study that nest.Hope the nest does well!

That looks like one of those little dime-store 'pet' turtles that parents turn loose into a local stream or lake after the kids get tired of feeding them. They used to cost 10 cents when I was a kid, but I think they cost a lot more now.

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