About 62 mammal species have been seen in the Park. Most of them live in the open forest and woodlands and are nocturnal, making it difficult to see them. Others, such as wallabies and kangaroos are active in the cooler parts of the day and are easier to see. The larger mammals are Dingos, Antilopine Kangaroos, Black Wallaroos, Agile Wallabys, and Short-eared Rock Wallabys. Smaller common mammals are northern quolls, brush-tailed phascogales, brown bandicoots, black-footed tree-rats, and black fruit bats. Dugongs are found in the coastal waters. However, recent surveys have shown smaller numbers of nearly all mammals throughout Kakadu. This includes once common and widespread species such as northern quolls.