Predation is a primary cause of nest mortality in many nests of small passerines.And the difference of fauna causes different patterns of nest predation in temperate, tropical and subtropical region.

• 天敌掠食是造成小型燕雀目鸟类繁殖失败的主因，而在不同的气候区，由于动物群聚组成的差异，也会导致天敌组成有所不同。