"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.
http://en.wikipedia.org/wiki/Kangaroo#Terminology
Well, duh!