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Rats are said to establish an order of hierarchy, so one rat will be dominant over another one. [52] Groups of rats tend to "play fight", which can involve any combination of jumping, chasing, tumbling, and "boxing". Play fighting involves rats going for each other's necks, while serious fighting involves strikes at the others' back ends. [53]
The giant kangaroo rat, is the largest of over 20 species of kangaroo rats, which are small members of the rodent family. It measures about 15 cm (5.9 in) in length, not including its long, tufted tail, and is tan or brown in color. Like other kangaroo rats it has a large head, large eyes, and long, strong hind legs which helps it hop quickly.
Ord's kangaroo rats are nocturnal, and spend their days in deep burrows. [26] Males are usually more abundant and active than females. Activity increases under cloud cover, particularly in winter. [7] Ord's kangaroo rats are active year-round in Texas, but further north, they are seldom seen above ground in cold weather. [26]
Kangaroo rats also live in colonies that range from six to several hundred dens. [10] The burrow of a kangaroo rat is important in providing protection from the harsh desert environment. To maintain a constant temperature and relative humidity in their burrows, kangaroo rats plug the entrances with soil during the day. [4]
Desert kangaroo rats are denizens of desert areas with sandy soil; vegetation is typically sparse and consists of creosote bush, a variety of grasses, and cacti. [8] Desert kangaroo rats live in burrow systems under slight mounds of soil 6-9m across; [8] they sleep in a den, which is sealed off at extreme temperatures, during the day. [4]
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Sport takes a break around much of the world this Christmas, but not in the US where Netflix expects a record audience for its first festive NFL games and a half-time show by Beyonce.
During the summer, males have home ranges of about 6.5 ha (16 acres), and females of about 2.5 ha (6.2 acres). [4] However, these contract dramatically in the late fall and winter, when little fresh food is available, and they rely instead on their caches to survive. At such times, home ranges may shrink to as little as 0.65 ha (1.6 acres). [10]