American German shepherds represent most of the international show lines of German shepherds and have a very sloped back and sharp angle in their hindquarters. The American lines tend to be longer and leaner than both types of German lines. British German shepherds have large bones and a long, straight body. Both British and American lines have calmer temperaments and lower energy requirements than the German lines. The Czech German shepherd lines have many similarities to the east German lines, and some consider them the same type of German shepherd. Other less known German shepherd lines are the white German shepherds (not albino) and long-haired German shepherds.