Tell me about Australian Shepherds?

English Shepherds are similar in appearance to Border Collies and Australian Shepherds. English Shepherds usually have tails and have a flatter head than Aussies. English Shepherds are never merle and Aussies frequently are. They are generally not square in body like an Aussie. English Shepherds tend to be larger than Border Collies but are most readily distinguished by their very different herding style.