Running over a turtle is like hitting a big rock rock - Michigan
A face full of poop from a crane flying above me - Mississippi River in northern Illinois
Bugs at night that covered my face shield, windshield and head light with bright red guts - 30 seconds and I pulled over - somewhere in Oregon at night. Used my drinking water to clean things so I could proceed.
What looked like black bugs. Slowed down. Turned out to be chucks of a tire from a semi. If I had not slowed down, the recap would have taken me out when it flew off the wheel. Somewhere in Florida
Crossing a narrow country bridge in Ohio Amish Country, a hawk departed the road kill it was dining on and hit my left mirror and my shoulder. No real damage to me, but got a small collection of feathers.
Several furry four legged critters - both daytime and night...including one huge raccoon...in several states
Came around a blind corner, again in Ohio Amish country, and found myself sharing the road with a herd being driven back to the barn. I pulled over to let them pass. Then a bull mounted a cow and did this thing while they moved past me. Later on the road, behind a liquid manure sprayer that was dripping...not a pretty sight or fragrance. Slowed down and backed off until he turned into the field he was going to spray.
Came up on a cattle hauler semi somewhere on an uphill grade in the Rockies. When the hill got steeper the exhaust from the cattle ran out of the back of the trailer and made life interesting.
Picked up a 20 penny nail in my /5 back tire on a back road in Kansas. My buddy took the wheel and tire into town while I sat on the side of road with my bike center stand on by rocks to raise it up. Only two cars passed in the three hours it took for him to get back with my repaired tire. After that I always carried a spare tube...and today tire plugs.
Was in northern Arizona. Off in the distance a very large RV was stopped in the road so I slowed down. There was a huge range bull in the middle of the road not letting the RV pass. When the bull looked a me, I slowly turned around and rode away. Went 150 miles out of the way to get where I was going. No contact, thank God.
Open face helmet, rural Michigan. A hornet came over the windshield and into the helmet by my right ear and temple. Several stings before I got stopped and able to remove the helmet. The hornet flew off.
I'm sure there are many more, but my memory fades.