squeak your knuckle
Carl
^^This.^^ Or learn to squeak with your lips, no hand movement necessary. Succulent!
Good story and good tip re a squeaker call. Also some good thinking and good shooting.
The best thing about call sounds you make without needing an external device is that you ALWAYS have the call with you, always available instantly. Using squeeks or other sounds I make with my voice I have called coyotes, foxes, lynx, black bears, moose, elk, blue grouse, and assorted such critters. I have a hand call around my neck when hunting anything any time in the woods, and always have my voice along.