*chief hare*

(Zool.) A small rodent (Lagamys princeps) inhabiting the summits of the Rocky Mountains; -- also called crying hare, calling hare, cony, American pika, and little chief hare. [ 1913 Webster ]

☞ It is not a true hare or rabbit, but belongs to the curious family Lagomyidæ. [ 1913 Webster ]