I've seen an otter on the Kankakee a couple of times...as for a bobcat, we had one come up our back hill to within 20 feet of the house, got to observe it through the laundry room window - I've only seen the bobcat during the short window before the sun sets.

I've also seen some "big cat" tracks in our area...supposedly, they've had several sightings here in NW part of the state of a big cat, my guess is it's a cougar come down from up north, extending its range to to overpopulation of what was once undeveloped land in Wisconsin and Michigan.