I have seen the birds fly at each other and fight by "flogging", on several occasions, but this encounter was much more like a wrestling match, with the birds using their beaks to gain strategic holds, and entwining the necks together to exert leverage on each other.
I did take a few still photographs while the turkeys were locked together and this is a tightly cropped portion of one of the better ones, which shows how they can grasp another birds head.
Mature Gobblers Locked In Combat-Note Snow Flying In Air
Canon 7-D 100mm-400mmLThe specks of snow in the photograph are from the bird's feet scuffling about in the snow cover during the struggle.
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