Amur tigers are sexually dimorphic (with two distinct gender forms). Males are larger than females. Their body is covered with narrow, vertical black, gray, or brown stripes, and they are the only large cats that have a striped coat. The long, thick fur on their neck and back is yellowish in the winter and reddish in the summer. However, a white coloration extends from their belly onto their sides, while their tail is also white and black.