Today is January 6, 2014. I have five hens (Agway chicks 2013, two bard black, one red, two white) and two multi-colored roosters (wild-looking) (given to me). I give them grain and table scraps but otherwise they live a feral life at the edge of the forest in Grafton, NY, at elevation 1300 feet above sea level. Their job is to roam about and eat ticks, mice, and to hide their eggs from me (So far I found two hidden nests full of frozen eggs). They all roost at night in a 50 foot tall hemlock tree outside my house. I did not have time to build them a proper chicken coop. Our guinea hens of several years/broods used to roost in a white pine tree, so I figured I would see if "feral" chickens can also do this. Sometimes I brought them inside the garage for the night if I could catch them. We had a big snow storm last week that brought temperatures as low as -10 degrees F at night. All seven chickens have survived outdoors "in the wild". One hen (small white) and one rooster spend the storm out of the tree. During and after the storm the five chickens (four hens, one rooster) spent three days and three nights in the tree without coming down to feed. One rooster stayed in a lean-to on the ground where their feed is kept dry. A day after the storm ended, he rejoined the other chickens up in the tree, and only two hens came down to feed. During the storm, I baked some feed and flour into a loaf and tied it to a tall pole/stick and pushed it up into the tree to feed the chickens in their roost. (for more than two days they ignored it). (The missing white hen had gone missing for multiple days in the past) After five days, I heard the missing white hen cluck, and I saw her sheltering under a different hemlock tree, where she was hiding/sheltering under a table. I put some feed under the table for her and she started eating immediately. I have read that wild turkeys will spend a week or more in their roosts during/after bad snow storms (until the snow firms up enough that they can walk on it). I was really amazed that the chickens (descended from "jungle birds") survived a night at negative ten degrees F, and two previous days/nights at about -5 degrees F, but the snow laden branches of the hemlock tree provided some additional shelter/insulation for them.
For reasons unknown, the predators (coyotes, fox, Fischer cats, bob cats, raccoons, skunks, weasels) that are active in the woods a hundred feet behind my house have not bothered/eaten the chickens, and a feral domestic cat who prowls the yard also ignores them. I periodically spray cat-style tick repellent (permethrin) on their skin up under their feathers to keep them flea and tick-free. The two roosters are aggressive protectors, and will attack any NEW person or thing that comes around. But, the hens were alone for months during the summer and nothing ate them then either. I nailed a sheet of aluminum flashing around the base of the hemlock tree to prevent raccoons or Fischer from climbing up the tree to eat the roosting birds at night, but I have never seen any predator tracks around the tree (other than the feral cat, who does not climb the tree). These chickens also have a very bad habit of pecking and eating foam insulation (e.g., Styrofoam coolers, blue house insulation, pink house insulation), which they seem to enjoy greatly.
If the hens and roosters survive till spring, I will let them breed feral and maybe add some bronze turkey poults to the family (hopefully the turkeys will fatten up by eating the acorns we get in the fall). I will try to put a shelter up in the tree they roost, but otherwise keep them as feral as they can be, and if the population grows to the point where it will be expensive to feed them next winter, then we will be eating some free-range/feral chicken next fall/winter.
n y tree farmer AT ny cap DOT rr DOT com