The present analysis of the energy balance in the winter-adapted Mountain Finch, Leucosticte brandti is based upon natural photoperiod of about 10 hours of light day-1 and constant temperature between 25° and -10℃.Gross energy intake and metabolizable energy intake increased as a straight line with decreasing temperature, the rates of increase are 0.0196 and 0.0149 Kcal gram-1 day-1 degree-1C, respectively. The maximum metabolized energy is 1.225 Kcalgram-1 day-1 reached at 0-℃.The amount of energy lost in ...