When not given a specific structure to roost in, chickens will sleep in trees. It is quite a sight to see. People will often also tie string around chickens' feet for easy wrangling. As a logical conclusion, these strings will get caught in the trees, and the chickens will be stuck in the most absurd positions. And so, I have had to save more than one chicken from this fate. Not before I've taken a photo of them, though.