The liger is the largest known cat in the world.[1] Imprinted genes may be a factor contributing to huge liger size.[6] These are genes that may or may not be expressed on the parent they are inherited from, and that occasionally play a role in issues of hybrid growth. For example, in some dog breed crosses, genes that are expressed only when maternally-inherited cause the young to grow larger than is typical for either parent breed. This growth is not seen in the paternal breeds, as such genes are normally "counteracted" by genes inherited from the female of the appropriate breed.[7] Other big cat hybrids can reach similar sizes; the litigon, a rare hybrid of a male lion and a female tiglon, is roughly the same size as the liger, with a male named Cubanacan (at the Alipore Zoo in India) reaching 363 kg (800 lb).[8] The extreme rarity of these second-generation hybrids may make it difficult to ascertain whether they are larger or smaller, on average, than the liger. It is wrongly believed that ligers continue to grow throughout their lives due to hormonal issues[citation needed]. It may be that they simply grow far more during their growing years and take longer to reach their full adult size. Further growth in shoulder height and body length is not seen in ligers over 6 years old, same as both lions and tigers. Male ligers also have the same levels of testosterone on average as an adult male lion, yet are azoospermic in accordance with Haldane's rule. In addition, female ligers may also attain great size, weighing approximately 320 kg (705 lb) and reaching 3.05 m (10 ft) long on average, and are often fertile. In contrast, pumapards (hybrids between pumas and leopards) tend to exhibit dwarfism. siberian tigers most most typically attack brown bears near the hibernaculum in the winter. Brown bears are attacked by tigers more often than black bears, due to their habit of living in more open areas and their inability to climb trees. When hunting bears, tigers will position themselves from the leeward side of a rock or fallen tree, waiting for the bear to pass by. When the bear passes, the tiger will spring from an overhead position and grab the bear from under the chin with one fore paw and the throat with the other. The immobilized bear is then killed with a bite to the spinal column. After killing a bear, the tiger will concentrate its feeding on the bear's fat deposits, such as the back, hams and groin. While tigers can successfully hunt bears, there are also records of brown bears killing tigers, either in disputes over prey or in self-defense, and in at least one instance, of a bear consuming a tiger.[4] Asian black bears and Ussuri brown bears constitute 5–8% of the Siberian tiger's diet.[10] Brown bears are estimated to constitute 1-1.5% of their diet.[19] Certain tigers have been reported to imitate the calls of Asian black bears to attract them. plus they can get up to 800 pounds so they are definately not pussys.