并非所有鸟妈妈都自己来孵蛋的。杜鹃鸟妈妈就会把卵产在别的鸟窝里。这是为

并非所有鸟妈妈都自己来孵蛋的。杜鹃鸟妈妈就会把卵产在别的鸟窝里。这是为了避免雄杜鹃鸟把刚生下来的蛋吃掉。

Results (English) 1:

Not all birds are mothers themselves hatching. Cuckoo mother will lay their eggs in other birds' nests inside. This is to avoid the newly born male cuckoo eggs eaten.

Results (English) 2:

Not all mother birds hatch their eggs by themselves. The mother of the azaleas would lay their eggs in other bird nests. This is to avoid male azaleas eating newly born eggs.

Results (English) 3:

Not all mother birds hatch their own eggs. Mother cuckoo will lay her eggs in another nest. This is to prevent the male cuckoo from eating the fresh egg.