Field mouse, Flying mouse, etc. See under Field, Flying, etc. -- Mouse bird (Zoöl.), a coly. -- Mouse deer (Zoöl.), a chevrotain, as the kanchil. -- Mouse galago (Zoöl.), a very small West American galago (Galago murinus). In color and size it resembles a mouse. It has a bushy tail like that of a squirrel. -- Mouse hawk. (Zoöl.) (a) A hawk that devours mice. (b) The hawk owl; -- called also mouse owl. -- Mouse lemur (Zoöl.), any one of several species of very small lemurs of the genus Chirogaleus, found in Madagascar. -- Mouse piece (Cookery), the piece of beef cut from the part next below the round or from the lower part of the latter; -- called also mouse buttock.