The White Bengal tigers are distinctive for their color fur. According to the website, “Animal Corner,” the correct term to name the white tiger is Chinchilla albinistic. The white fur is due to the lack of pheomelanin pigment, which is found in Bengal tigers with orange color fur. When compared to Bengal tigers, the white Bengal tigers tend to grow faster and heavier than the orange Bengal tiger. They also tend to be somewhat bigger at birth, and as fully grown adults. White Bengal tigers are fully grown when they are 2–3 years of age. White male tigers reach weights of 200 to 230 kilograms and up to 3 meters in length. Similar to zebras, the white Bengal tiger’s stripes are like fingerprints, no two tigers have the same. Also, the stripes of the tiger are a pigmentation of the skin. For a white Bengal tiger to be born, both parents must carry the unusual gene for white colouring, which, according to the website “Animal Corner,” only happens naturally about once in 10,000 births. As stated by Kailash Sankhala, the director of the New Delhi Zoo in the 1960s, “one of the functions of the white gene tiger may have been to keep a size gene in the population, in case it's ever needed." Dark-striped white individuals are well-documented in the Bengal tiger subspecies, also known as the Royal Bengal or Indian tiger (Panthera tigris tigris or P. t. bengalensis), and may also have occurred in captive Siberian tigers (Panthera tigris altaica), as well as having been reported historically in several other subspecies. Currently, several hundred white tigers are in captivity worldwide, with about one hundred being found in India. Nevertheless, their population is on the increase. Nandankanan in the state of Odisha, India, is the host zoo for white tigers. In 1980, the first litter of white tigers were born to Deepak and Ganga, two normal tawny tigers. Subsequent litters of white tigers have been distributed to zoos both at home and aboard. Currently, Nandankanan is home to over 34 white tigers. Their unique white color fur has made them popular in entertainment showcasing exotic animals, and at zoos. German-American magicians Siegfried & Roy became famous for breeding and training two white tigers for their performances, referring to them as "royal white tigers," the white tiger's association with the Maharaja of Rewa. The first white Bengal tiger was found in India by royalty Maharaja Shri Martand Singh of Rewa. According to the website, “Animal Corner”, in 1948, Maharaja killed the white tigress leaving four cubs behind. Later, the cubs of the dead tigress were shot except for the white cub. It is believed that all white Bengal tigers are descendants of this cub.