I found the following description of Australian aborigine hunting
preferences relevant to the kangaroo discussion:

        The great challenge for the Aborigine was to obtain
        enough dietary fat. They were close observers of nature
        and knew just when certain animals were at their fattest.
        For example, kangaroos were fat when the fern leaf wattle
        was in flower; possums when the apple tree was in bloom.
        Other signs indicated when the carpet snake, kangaroo
        rat, mussels, oysters, turtles and eels were fat and at
        their best. Except in times of drought or famine, the
        Aborigine rejected kangaroos that were too lean they
        were not worth carrying back to camp.1 During periods of
        abundance animals were slaughtered ruthlessly, and only
        the best and fattest parts of the killed game were
        eaten. Favorite foods were fat from the intestines of
        marsupials and from emus. Highly saturated kidney fat
        from the possum was often eaten raw. The dugong, a large
        seagoing mammal, was another source of fat available to
        natives on the coasts.

        Other sources of fat included eggs from both birds and
        reptiles and a great variety of insects. Chief among
        them was the witchety grub, or moth larva, found in
        rotting trunks of trees.  These succulent treats often
        over six inches long were eaten both raw and cooked.
        Fat content of the dried grub is as high as 67%.  The
        green tree ant was another source of valuable fat, with a
        fat-to-protein ration of about 12 to one. Another
        important seasonal food in some parts of the country was
        the begong moth.  The moths were knocked off rock walls
        on which they gathered in large numbers, or smoked out of
        caves or crevices. They were roasted on the spot or
        ground up for future use. Moth abdomens are the size of a
        small peanut and are rich in fat.

This is from
http://www.westonaprice.org/australian_aborigines.htm

Todd Moody
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