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Line 21: − + − − Species which have this unusual ability normally mate again soon after the female gives birth. The tiny newly born kangaroo (less than 25 mm long) moves unaided into its mother's pouch and attaches itself to one of four teats. During the early stages of pouch life the young is permanently attached to the teat, but as it matures and begins to grow hair it also develops the ability to release and reattach itself to the teat. − − In the late stages of pouch life, once it has a thin covering of fur, the young one begins to explore the outside world for increasing lengths of time until eventually it is old enough to be excluded permanently from the pouch. Complete weaning may take a number of months more after the young has permanently left the pouch. If the mother gives birth during this time, the newborn young will attach itself to a different teat to that being used by the older young. It is remarkable that when this happens the mother produces two different kinds of milk for the two different-aged young<ref name="kangbio"/>.
→Development of the Young in the Pouch: Fascinating, but plagarism. Must be re-written.
===Development of the Young in the Pouch===
===Development of the Young in the Pouch===
Kangaroos have adapted to the varied conditions across Australia in many ways. One of the most unusual is the way females of some species can delay the progress of pregnancy. In this way the female is ready to give birth to a replacement for the young in her pouch if it dies early, or within a week of when it permanently leaves the pouch. This ability to delay births means that there can be up to 12 months between a mating and the birth of the young one resulting from that mating (when the normal gestation period is less than 35 days). It also means that the species can best respond to periods of drought and plenty.
"Kangaroos have adapted to the varied conditions across Australia in many ways. One of the most unusual is the way females of some species can delay the progress of pregnancy."<ref name="kangbio"/>.
==Origins==
==Origins==