Mara Dolichotis patagonum, is comparatively a huge rodent of the Mara genus (dolichotis) which they otherwise call Patagonian Cavy, dillaby or Patagonian. The Patagonian Mara looks like The Patagonian jackrabbit. Its long limbs and ears characterize this breed. Its forelimbs are shorter than but not as muscular as its hind limbs that have a longer radius. The feet are hoof-like. Cavies delivered in captivity become human friendly. If they have not mingled with humans, they turn nocturnal to stay away from human interaction.
People, at times, consider the Degu as a brush-tailed rat. Besides, they have named it the common Degu, to distinguish it from the associate members of the species of Octodon Degu, whose members also go by the name “Degu”, even though they have other names. This small Degu has a body of length 25 to 31 cm (9.8 – 12.2”). It weighs 170 to 300 gm (6.0 to 10.6 Oz). The Degu has yellow, brown fur on top and creamy-yellow underneath; around the eyes, it is yellow and it has a lighter shade round the neck. Its tail is thin and long. The tip of the tail has a black tuft. Its toes are light gray and ears sparsely furred. The tamed degus let you to lift them up by scooping them in cupped hands by placing one hand beneath each side of their body.
People refer to Prairie dogs as burrowing rodents. They occupy huge colonies in the grassy areas of Western and Central North America. At an average, these heavy-bodied rodents, grow to a length of 30 to 40 cm (12 to 16 inches), this includes the tail. The rodent’s weight is around 0.5 to 1.5 Kg (1 to 3 lbs). Sexual dimorphism in the prairie dog’s body mass varies from 105 to 136% between sexes. Prairie dogs are very friendly and clever, even though they may bite in play. When you have a prairie dog as a pet you must totally commit to it; they do not like you sharing their love with your peers.