Living and working in the rural West I encounter things a lot of planners in urban areas will not: pronghorn antelope, mule deer, ranch dogs, rattlesnakes, cactus, and a lot of barbed wire. Once I came upon the Native American burial site of a boy who died in the early 20th century.
I think the oddest thing for me was coming upon a badger rather suddenly. If you have never heard a badger, you have not heard one of the bone-chillingest sounds known to man. Sort of a fierce growling scream. Scared the hell out of me.
I was doing an inspection for subdivision review on a large parcel and I heard digging. When I got close, out of a hole pops a badger growling and screaming. He sees me and charges. Low, squat, intense and fierce they are. I backed the hell out of there (as scary as a badger is coming at you, it is even scarier to have one behind you). Thankfully he scampered back to his hole, but stayed topside to growl at me more.
What have you seen out of the ordinary and noteworthy?