At first I didn't understand it, so I bought it.
Wikipedia enlightened me:
"One of the national symbols of Canada, the beaver is depicted on the Canadian five-cent piece and was on the first Canadian postage stamp, the Three Penny Beaver. It is also the state animal of Oregon and New York, and a common school emblem for engineering schools, including the California Institute of Technology and the Massachusetts Institute of Technology, as well as the mascot for Oregon State University and the City College of New York. The beaver also appears in the coats of arms of the University of Toronto, Wilfrid Laurier University and the London School of Economics."