Folks: Looking for help identifying a bird I see on the edge of my field. About the size of a medium-sized chicken, plump roundish body, slim neck, smallish head with no obvious things sticking up or hanging down, very dark-brown or black all over. Medium-length tail that, when flying, is spread pretty straight-across. When rousted, flies straight and level into deeper woods, with "thundering" wing-beats; never hear any vocalizations. Very skittish; I never get closer than 50 feet before it picks me up & hightails off. Have at least 2 in residence now. Location is central coastal Maine, on edge of fields next to deep woods. Got any ideas? By the way, on a different subject, we've got LOTS of wild turkeys around here; my "resident" flock currently = 22.