This doesn't show "her" head very well, but her snood is about 1" long and she has a beard starting that's about 1" long, and I've seen her display her feathers a couple of time, so I really thought she was a Tom! I love her. She's the sweetest bird I have. Oh, plus, she's HUGE.
I don't raise turkeys, but am planning to this spring. I'm not too great at sexing on sight, but I'm pretty confident that's a turkey egg. If you only have the one turkey, I'd say she's the culprit, lol.