The extensive collection, housed in several rooms, includes extinct animals and birds such as the quagga, thylacine, great auk and reconstructions of the moa and dodo. Oddities include hybrids and examples of abnormal coloration. The dogs display was relocated to the Rothschild Zoological Museum from the Natural History Museum, South Kensington, London after World War II. This shows how domestic dogs have changed shape due to selective breeding and includes the tiny Russian and Mexican lapdogs as well as famous racing greyhounds. The Museum has six galleries, each one of which houses a different set of animals. The first gallery contains birds, large carnivorans and primates, the second is used to show temporary exhibits, the third crocodilians, crustaceans, fishes, insects, large mammals and marine invertebrates, the fourth accommodates kangaroos and odd-toed ungulates, the fifth holds bovids, hippopotamuses, pigs and marine mammals, and finally the sixth gallery contains amphibians, bats, various British mammals, domestic dogs, ratites, lizards, snakes, turtles and small mammals. The Museum also contains a Discovery Room, designed for young children and the Rothschild Room which is a room set out to recreate the surroundings that the Rothschild family would have worked in. It became part of the Natural History Museum in 1937. In April 2007 its name was changed to the Natural History Museum at Tring.[1]