It is primarily known for its population of Indian rhinoceros. There are habitats for the Bengal tiger and Indian rhinoceros. In the second half of the 20th century, zoos became adept at breeding Indian rhinoceros. The mission returned without an agreement, but diplomatic gifts were exchanged, including an Indian rhinoceros. Sport hunting of the Indian rhinoceros became common in the late 1800s and early 1900s. In about 1684, the first presumably Indian rhinoceros arrived in England. The Indian rhinoceros forms a variety of social groupings. The Indian rhinoceros is regionally extinct in Pakistan. The Indian rhinoceros makes a wide variety of vocalisations. Kans grasslands are an important habitat for the Indian rhinoceros ("Rhinoceros unicornis"). The Indian rhinoceros was initially difficult to breed in captivity. Elephants, the Indian Rhinoceros and eight species of deer are also found. In Europe, Zoo Basel keeps Asian small-clawed otters together with Indian rhinoceros. Rdura was the first Indian rhinoceros born in a zoo in 1956. Like the closely related, and larger, Indian rhinoceros, the Javan rhino has a single horn.