The largest of the rat-kangaroos, the rufous rat-kangaroo builds a grassy nest in which to spend the heat of the day. It has little fear of man and will enter foresters' camps and even feed from the hand. The lack of fear makes the animals vulnerable to attack by introduced dogs and red foxes, and while their populations are in no immediate danger, the future survival of these little kangaroos is a cause for concern. They breed slowly -- a maximum of 2 young a year -- but nothing more is known of their breeding habits.