I've seen a few cats too, but they are supposed to be here.
The strangest I've seen is a coot walking throught the timber at 9000 feet in CO, no water for miles. With bull elk bugling all around. Dad was with me, was weird.
The other was a cow elk running through a grain field about 100 miles east of Ft. collins, CO. Had to pull over cause I couldn't believe it. Was later hunting along the platte and asked a C.O. He said they saw a couple out by Sterling that year. Those are the two strangest.