Calculation of the daily metabolizable energy (DME) of a nestling Mountain White-crowned Sparrow based on values for carcass energy content (EC), energy retained as new tissue (RE), laboratory resting metabolic rate (RMR, O₂ consumption), and field metabolic rate (FMR, doubly labeled water technique) derived from regression equations fitted to measurements of different-aged nestlings measured at Tioga Pass Meadow, California