鸟的寿命与其发育过程中性成熟早晚有关,与自然环境的变化、食物的多少、天敌的数量等也有关。一般性成熟晚的鸟类其寿命就长些,性成熟早的鸟类则寿命短些。因而,凡大型鸟类寿命长,而雀形目鸟类寿命则短。由于激烈的自然竞争、天敌的侵袭、疾病的发生,以及自然气候的骤然变化和自然界意外事故的发生,都会威胁到鸟类的生存。还有,雏鸟的出生率、成活率以及死亡率,均为影响鸟类寿命的 The lifespan of a bird is related to its sexual maturity in the developmental process. It is also related to changes in the natural environment, the amount of food and the amount of natural enemies. Generally mature late birds have longer life expectancy, sexually mature birds have shorter life expectancy. Thus, where large birds have a long lifespan and Passerine birds have short lifespans. Due to the intense natural competition, the invasion of natural enemies, the occurrence of diseases, sudden changes in the natural climate and natural accidents, the survival of birds will be threatened. Also, the birth rate, survival rate and mortality of chicks are all affecting the life of birds