Resistance to Hunger in Birds

摘要: importance to birds, especially in the winter when air temperature may also be low. Hunger becomes more quickly critical at low temperatures because general metabolism is higher and energy required maintain constant body temperatures. Small wild birds do not feed during hours of darkness, nights too long cold for some species survive. Thus, capacity different survive periods without food important controlling their migration, distribution, abundance (Kendeigh, 1934). There have been few studies date on survival time with-