my friend has set back in the winter while in the deer stand and watched 200+ birds in one flock. biggest ive seen is 150+ while driving and had a group of 80 or so move in on me and dad while on our very first turkey hunt ever.

so i think its safe to say, as stated above, they flock up and find watever food available. they like the safety of the real thick terrain where they can still find food. nicely told mauser06.