The word "moose" came to us from Algonquian Indians. Consequently its plural, instead of being "mooses" or "meese", is the same as the singular. That is true of most Indian names whether of a tribe, such as the Winnebago and Potawatomi, or of an object such as papoose. It is also true of many wildlife names not of Indian origin -- for example: deer, mink and grouse.