Nests inside and under buildings, or in piles of rubbish or wood. Excellent climber that can often be found in the upper parts of structures. Roof rats are highly adaptable. They prefer to live in high places, but may live in a variety of environments. They are nocturnal by nature and are accomplished climbers. As their name suggests, roof rats may be found in elevated areas such as trees, rafters, attics and roofs. Roof rats can also nest on the ground if necessary. In dense populations, roof rats will establish a social hierarchy, wherein dominant males mate more than subordinate males. They prefer to consume fruits (sometimes referred to as the “fruit rat” or “citrus rat”) and nuts, although roof rats are omnivorous and will feed on almost anything available to them. These rodents have been known to consume tree bark, meat and grain. Roof rats are also food hoarders, stashing supplies of food such as seeds and nuts.