"The kangaroo," writes Richard Waller, "was first discovered in Australia by Captain Cook. He brought back its skin and asked painter George Stubbs to make a picture from it. He inflated the skin, and this is the finished picture at Parham House." The rest of the kangaroo was eaten by the expedition, with relish.
Well, duh!
http://en.wikipedia.org/wiki/Kangaroo#Terminology