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Warthogs are day animals and spend most of their time looking for food. They are normally found in family groups. Warthogs have the peculiar habit of kneeling on the front knees while feeding and foraging in a localized area. They shelter in burrows at night, which they enter tail first. Socially, three main groups are encountered, namely solitary boars, bachelor groups, and matriarchal groups. Matriarchal groups consist of adult sows with their young and yearlings. Boars play no part in rearing piglets.

The white rhinoceros, white rhino, or square-lipped rhinoceros (Ceratotherium simum) is the largest extant species of rhinoceros. It has a wide mouth used for grazing and is the most social of all rhino species. The white rhinoceros consists of two subspecies: the southern white rhinoceros, with an estimated 19,682–21,077 wild-living animals in the year 2015, and the much rarer northern white rhinoceros. The northern subspecies has very few remaining individuals, with only two confirmed left in 2018 (two females: Fatu, 18, and Najin, 29), both in captivity. Sudan, the world’s last known male Northern white rhinoceros, died in Kenya on 19 March 2018 at age 45.