Is it permissible to keep hunting trophies?

Is it permissible to keep hunting trophies? (A hunting trophy is an item prepared from the body of a game animal killed by a hunter and kept as a souvenir of the successful hunting expedition. Often, the heads, skins or entire bodies are processed by a taxidermist, although sometimes other body parts such as teeth, tusks or horns are used as the trophies. Such trophies are often displayed in the hunter's home or office, and often in specially designed "trophy rooms," sometimes called "game rooms" or "gun rooms," in which the hunter's weaponry is displayed as well.