大雁是有名的候鸟,它们的老家是在北方西伯利亚一带,因为北方的夏季日照时间长,食物丰富,敌害不多。到了冬季,北方一片冰天雪地,什么昆虫、蠕虫和植物种子都不见了,大雁找不到食物吃,便成群结队浩浩荡荡地飞向比较温暖的南方。躲过北国的严寒,同时雌雁和雄雁开始交配。等到春天到来时,雌雁已孕育着成熟的卵,于是就起程急急飞回北方产卵、抱窝,哺育后代。 Wild geese are famous migratory birds. Their hometown is in the northern Siberia area. Because the summer sunshine in the north is long, food is abundant and there are not many enemy predators. In the winter, when the north was covered with ice and snow, what kind of insects, worms, and seeds of plants were gone, the wild geese could not find food, and they swarmed to the warmer south in droves. Avoiding the cold of the North, at the same time, the female geese and male geese began to mate. By the time spring arrives, the female geese have bred mature eggs, so they set off quickly to return to the north to spawn and hug wolves and nurture their offspring.