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Reproduction is the key to species conservation. Therefore, the aim of all animal parents is to give their offspring a good start in life. But before they are born, they have to find a mate, mate and build a nest. Mammals, insects and birds manage these tasks in very different ways. 繁殖是物种保护的关键。因此，所有动物父母的目标都是让后代有一个良好的开端。但在它们出生之前，动物们必须找到配偶、交配并筑巢。哺乳动物、昆虫和鸟类以截然不同的方式完成这些任务。