Again, thanks all for your help. A friend was commenting on the power of the "Internet" and I said it's the power of the people (like you all). From a duck attack to a possible answer in under an hour -- to a possible solution and a captured predator in less than 8 hours.
You are all amazing, thank you.
Imfowl, thanks, you helped me answer a question, because I read conflicting things about muskrat diets. I know animals in some parts of the country have different names. For instance, chipmunks are called "squinties" around some part of Iowa. Any way, I looked up Nutria Rat and Muskrat...and Nutria Rat and the Muskrat are different critters. The
Muskrat from around here is omnivorous and leaves a characteristic "musk" scent. The
Nutria rat looks about the same size and features, but different animals.
It is good to know minks typically don't attack in water.
For those curious, here are links to two cell phone photos , one of the upside down turtle and another of its claw span. Its dead, but no obvious trauma in the photos.
http://www.smallfarmlife.com/wp-content/uploads/photo_062709_002.jpg (turtle)
http://www.smallfarmlife.com/wp-content/uploads/photo_062709_004.jpg (claw)
The other two lines are still baited, but caught nothing overnight.