Sure looks like an early 40's era trank dart! Ya see, back during the War, there was a huge Gov effort underway to catch a lot of migrating Bigfoots to send to the front...Operation Sasquatch, They were used in various capacities....mainly to breach those thick French hedge rows and flip over Panzers...Everybody knows Bigfoots migrate right through Kansas yearly. Even to this day, Kansas is a natural funnel for various sorts of skunk apes, plus there was a decent rail hub for transport...So yeah....Great find!
FWIW, in the parks and beaches around here, I find an amazing amount of these duck calls! See that one in front of the hand carved ivory spoon? Along with the petrified dinosaur trachea and Indian trade beads?? I dont know exactly why, but these duck calls are all over the place!?..The reed is gone, and when you blow on them they dont sound anything like a duck?...So I got my own mystery to figure out here....