Like other big cats, tigers have a white spot on the backs of their ears. It is believed these spots, called ocelli provide a visual indication of the animal from the rear when it is being followed by its cubs or kittens.
Tigers are thought to be nocturnal predators, but, in areas where humans are absent, they have been observed hunting during the daylight hours (using remote cameras). They generally hunt alone and stalk and ambush their prey as most other cats do, using their body size and strength to knock large prey off balance followng through using sharp claws and teeth and a very strong jaw!
A tiger's diet will vary depending upon the availability of prey in their region. The Bengal Tigers in India will mostly feed on larger and medium-sized animals such as sambar, wild boar, a water buffalo and domestic buffalo. The Siberian Tiger's main prey species include wapiti, wild boar, moose, and musk deer. The smaller species will often eat much smaller prey, such as domestic animals, monkeys, peafowls, hares, and fish.
Tigers utilize a variety of vocalizations to communicate over long distances, including roaring, moaning, and chuffing. A tiger's roar may be heard from distances of more than two miles. A tiger's moan is more of a subdued roar and is usually made while tigers are calmly walking with their heads in a downward position. What is Known as a tiger's chuff is a friendly vocalization used primarily for greetings and is only audible at close range.
postscript: This article was written in responce to Steven Frys Tweet on the very real crisis facing the tiger populations all over the world. Please view and sign the petition on the website of the painter David Shepherd: http://www.davidshepherd.org/help-us/tiger-time/donate/
Another interesting article about the real plight of Tigers was found here when researching for this post:
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