Cuckoo：Mother bird is too smart. Big worms to feed their children first鸟妈妈太聪明了，有大虫子先喂自己的孩子，杜鹃鸟只能眼馋

[@dennisben3024]

bird parents feed chicks in order to get feacal sac..the noisy cuckoo provides zero poop sac

[@thomasmleahy6218]

Both parents are identical and both are feeding the chicks, that may be the father.

[@srabonirakshit6066]

The mom is of plain grey nd father is of different shades of blue.

[@icc64]

I think best explanation

[@Zeromegas]

She considered the Cuckoo as a Runt aka last to be feed

[@pinkchilldivestmentor]

Devil bird thwarted and overpowered

[@fgsgt23]

Nice..🤙🏼..complete video please..🙌

[@user-if2wy9og7z]

看著眼熟的內容，最後這隻杜鵑好像來不及長大就拜拜了

[@wellminglee]

這看起來是以前播過的影片

[@icc64]

They know what to do without us humans .is cruelty to have more n more viewers in detriment of birds . If cuckoo live or not is not our responsibility. Thnks for this video . But dont interfere .

[@josofin]

杜鵑媽媽把蛋下到了可能巢內早已孵化幼鳥的巢。杜鵑幼鳥孵化出來時來不及推他們出去。

[@thomasmleahy6218]

And it tries to take all the food, always demanding more. The aggressive chick gets more food.