smiling tiger illustration in front view

>For other uses, see Tiger (disambiguation). Tigers (Panthera tigris) are mammals of the Felidae family and one of four "big cats" in the Panthera genus. A group of tigers is called an "ambush" or a "streak". They are predatory carnivores and the largest of all living cats. Most tigers live in forests and grasslands (for which their camouflage is ideally suited). Among the big cats, only the tiger and jaguar are strong swimmers, and tigers are often found bathing in ponds, lakes and rivers. Tigers hunt alone and eat primarily medium-sized herbivores such as deer, wild pigs, and buffalo. However, they will also take larger or smaller prey on occasion. Humans are the tiger's only serious enemy and often kill tigers illegally for their fur or penises, which are used as aphrodisiacs in Chinese Medicine. Poaching for fur and destruction of habitat have greatly reduced tiger populations and it has been placed on the endangered species list. See more at Wikipedia.org...

>For other uses of the word head, see head (disambiguation). In anatomy, the head of an animal is the anterior part (from anatomical position) that comprises the mouth, the brain and various sensory organs (e.g. organs of sight, hearing, smell and taste). See more at Wikipedia.org...

>For other uses, see Smile (disambiguation). In physiology, a smile is a facial expression formed by flexing muscles most notably near both ends of the mouth, but also around the eyes. Among humans, it is customarily an expression of pleasure or amusement, but can also be an involuntary expression of anxiety. There is much evidence that smiling is a normal reaction to certain stimuli and occurs regardless of culture. Many studies indicate that smiling is an innate reaction, as children blind from birth smile; however feral children generally do not smile, perhaps lending evidence to the contrary. Among animals, the exposure of teeth, which may bear a resemblance to a smile, are often used as a threat - known as a snarl - or a sign of submission. See more at Wikipedia.org...