Rajasthan is the home of the tigers, black bucks, chinkara, the rare desert fox, the endangered caracal, the great Indian bustard, gavial, monitor lizard, wild boars, porcupine. Migratory birds like the common crane, ducks, coots, pelicans and the rare Siberian cranes, imperial sand grouse, falcons, buzzards flocks to this state during the winter months. Typical areas representing each of the ecosystems have been earmarked as special areas wildlife. Rajasthan boasts of two National Parks, over a dozen Sanctuaries and two Closed Areas. Most of these areas are open to visitors round the year but are closed briefly during the monsoon.