These are syadei, made by members of the Nenets people, an Indigenous community in North Siberia.
It's difficult to describe what a syadei is accurately in English, because they are part of a very different way of viewing the world. For Nenets people, syadei were and are alive. They see, feel, communicate and act, and are part of the way Nenets people communicate with their landscape, reindeer, game and ancestors. They might be considered the material version of a god, spirit guardian or ancestor.