I have made my own observations of the pigeon on my home balcony, where I installed a feeding tray. From time to time I threw some wheat corn there, and the pigeon was satisfied as well as I was. In the picture the pigeon's way to warm itself when it was cold outside, is seen. I have observed different ways of the pigeons fly: They fly steeply up and fall down with wings spread as parachute, uttering strange voices. 
While finding informations about birds in Internet I've found this animation, made by an unknown author. I thought, it to be suitable to my page and therefore I copied it.