The kangaroo rarely gives birth to more than one young at a time. When the young one is born the mother takes it up with her mouth, opens the pouch with both fore feet, and attaches the little creature to the breast. Twelve hours after birth it has a length of only a little over one and one-fifth inches. Its eyes are closed, its ears and nostrils are only indicated, the limbs yet unformed. There is not the slightest resemblance between it and the mother. For nearly eight months it is nourished exclusively in the pouch. A considerable time after it first peeps out of the pouch the young one occasionally leaves its refuge and roams about near its mother, but for a long time it flees back to the pouch whenever it apprehends any danger. It approaches its mother with long bounds and dives headlong into the half-open pouch of the quietly sitting female.

Numerous methods are employed to exterminate the animals; they are shot with fire-arms or coursed to death by hounds, and that for very wantonness, for the slain bodies are left to rot in the woods. "That is the reason," says an anonymous writer, "why the kangaroos are already exterminated in the environs of all larger cities and settlements; and if this savage chase is permitted to continue, it will not be long ere they will be numbered among the rarer animals in the interior also."

The kangaroo readily resigns itself to confinement, and is easily maintained on hay, green fodder, turnips, grain, bread, and similar articles of food. It does not require a specially warm shelter in winter and breeds readily if given proper care. At present it is more rarely seen in confinement in Europe and America than when it was more numerous and easier to capture in its native country. With good treatment it survives a long time; specimens have lived in Europe from ten to twenty-five years.

The kangaroos are very dull in intellect, even sheep being far superior to them in this respect. Anything out of the accustomed order confuses them, for they are not capable of a rapid comprehension of new surroundings. Every impression they receive becomes clear to them only gradually. Brehm says a captive kangaroo becomes used to man in general, but expresses doubt whether it discriminates between its keeper and other people.