usually, the cuckoo replaces one egg with its own and not simply add one to the nest. there were likely four reddish eggs before the cuckoo paid a visit
That schuld be good IDEA for our GUVERMANT ,,first take care of your CITIZENS before they accept IMIGRANTS or refiugise from different parts of the world. They schuld WATCH that VIDEO every single day in parlament😡😡😡😡🤢
@@butmunchass Some have developed the ability to create eggs that closely resemble the ones they parasitize in color and spotting, but they'll be bigger. Hard to believe.
That is, assuming the cuckoo's parents didn't see that. Some brood parasites have been known to come back around to check up on their egg or chick from time to time, and vengefully destroy the host's eggs or kill the host's hatched chicks themselves if they find that their egg was destroyed or the resulting chick has died.
@13ased_American The birds don't think like that. It's totally based on instinct, which has been hardwired into them. Do you think cuckoos learn the behaviour from their mothers? Obviously not, because they are raised by other birds.
@@kathleenevans1201 I'm assuming English your first language, and that's okay. Baby is, by English definition, used to describe the young of any creature, not just humans. Sure, other creatures may have specific names for their babies, but that does not mean the word baby fails to describe their young. It would be like saying the word "moon" cannot describe the moons of Mars, because the moons don't orbit Earth. That's just not how it works. So in short, the word baby is being used correctly, as it means the young of any creature.
All kind of birds are know for having a very good memory, she probably suffered a previous attack for the first time and it will not fall in the same trick again. Birds never forgets anything
This is, absolutely, not the case. Most birds will fall for this if the eggs look close enough to their own. Some will even fall for it when they don't. This just happens to be a case where a cuckoo that's eggs look more like robins was not able to find a robin nest to lay in. So she picked what was available, and it was ill suited for blending in.
Usually Cuckoos eggs mimic a particular bird species in their environment. Seems like this one was a robin mimic. It might've been forced to lay its egg in an ill-suited nest due to a lack of Robins in the area.
Aren't robins particularly good at spotting fakes? Pretty sure there were studies where a nearly identical egg was placed in a nest and the mother found it immediately. Might not have been robins though.
Sadly it usually works since most Birds are mind-meltingly stupid. Even when the Cuckoo hatches and grows to be bigger than the Parents, most Birds do not suspect a thing.
@@l.n.3372 the colors of an egg are applied as the egg passes through the mother. the coloring is mostly done so mama bird knows that the eggs are hers and not some other breed. Some parasite birds, cuckoos are one type, color their eggs to match their preferred host species egg colors.
Lots of cuckoos have evolved to lay eggs similar to the eggs of their chosen species to dump their eggs on.. This one seens to be an exception.. Possibly a young inexperience cuckoo or a lack of alternative nests..?
@@yellard6785Most likely just a fake video, author planted the egg of some bird (Maybe not even cuckoos) himself and filmed it. There are no untrained young cuckoos here, they make perfectly camouflaged eggs instinctively, they do not learn it.
@@yellard6785Most likely a fake video, the author himself planted the egg of some bird that may not even be a cuckoo and filmed it on video. There are no inexperienced cuckoos, this is not what they learn, they make perfect-looking eggs for the eggs of another bird instinctively. They study the eggs of another bird, and after their body masks the egg itself, after which they wait until the parents fly away or distract them, fly into the nest, throw out one of the eggs and replace it with their own, which looks like almost an exact copy of other eggs.
@@yellard6785Most likely a fаkе vidео, the author himself planted the egg of some bird that may not even be a cuckoo and filmеd it on vidео. There are no inexperienced cuckoos, this is not what they learn, they make perfect-looking eggs for the eggs of another bird instinctively. They study the eggs of another bird, and after their body masks the egg itself, after which they wait until the parents fly away or distract them, fly into the nest, throw out one of the eggs and replace it with their own, which looks like almost an exact copy of other eggs.
@@yellard6785Most likely a fаКе v|dео. There are no inexperienced cuckoos, this is not what they learn, they make perfect-looking eggs for the eggs of another bird instinctively. They study the eggs of another bird, and after their body masks the egg itself, after which they wait until the parents fly away or distract them, fly into the nest, throw out one of the eggs and replace it with their own, which looks like almost an exact copy of other eggs.
@ginapilkington3204 They are children, the comment simply states that the parent bird either had a lot of experience or previously lost an egg due to a cuckoo bird. Plus, the baby birds are still in the egg, so they are technically children.
And dad. Join the movement to include fathers, as in many breeds, BOTH parents are identical, or close enough to require expert observation. Both brood, feed, and tend nest equally. So let's quit these comments by people who don't know any better and claim mother this and mother that, when half the time it's dad, not mom. Doesn't mean all species, as some deliver to mom. Raptors, totally different, some smaller breeds will have both. One creator in the uk had a male do it all, when the female never returned, and the creator has also gotten others involved in foster parenting, even barn owls! Quite Interesting. So don't be like the uninformed and always go far afield in their ignorance in praising mum for everything good, just short of sainthood, and just enjoy what many have never seen before, that in itself is beyond wonderful.
Some birds recognize this some don't. The big problem is the cuckoo shoving the eggs, and chicks out of the nest, sometimes with parent bird watching it happen, being puzzled, doing nothing. The cuckoo causes such a disruption that brooding ceases because 'the thing' never rests. 'The Thing' 😮
Bird: “Hmm…I am not a man in the West who raises the children of other men, only to have his house and home taken away from him in the Divorce courts”.
thats a lot of free protein for that bird all things considered Imagine the amount of energy the cuckoo mother put into producing that egg, and then it went pfft
It's crazy to think how entire species of bird are parasitic. Imagine a species of human that survived only by sneaking into hospital nurseries and inserting their babies into the nursery, then when the nurse gives the baby to the parents they go "will you look at that, theres an extra one in here!" And because you don't quite know which one its yours, you take both home
It'd be worse, the Cuckoo chicks usually hatch earlier and are generally larger than the host birds. So they will almost always kill off the other chicks by pushing the other eggs out of the nest.
Smart bird tried to pick it and throw outside but it couldn’t get in it’s mouth so that pecked open and reduced the weight so it can get rid off, how it came back and cleaned up the nest is priceless!
Thank you for this video. Now I can sleep in peace. Being pregnant n finding out about this awful birds made me restless. Thank you mother for eating that egg n throwing it out to save your kids. Nature right. What a world 🌍
Too bad for the Mother Cookoo, this one can count to three and is not color blind 😂
😂😂😂
usually, the cuckoo replaces one egg with its own and not simply add one to the nest. there were likely four reddish eggs before the cuckoo paid a visit
The mother cuckoo is not much of a mother to abandone her egg!😔 Still it's sad.😥
That's funny!!
@@brendaann727… they’re parasitic. They lay eggs in other bird nests so another bird mom has to feed/take care of them.
Bird: Someone left me some desert.
Cuckoo: I left that there for you to raise...
Bird:...just raised my cholesterol....
Eggs dont raise Cholesterol!
over 100 likes and no comments? Lemme fix that
over 100 likes and no annoying-jimmy-correcting-the-spelling-mistake? lemme fix that
dessert*
eggs dont raise cholesterol!
Eggs are full of cholesterol, but they don't raise our cholesterol when we eat them. We used to think they did, but now we know they don't.
Smart bird! I love how it made sure to not peck the other eggs and it also made the most of a meal. ❤
that bird was like hey who delivery this meal
😂
I wondered if she'd eat it. Oh, and loved the natural background noise ... no loud music.
Mother Bird said, "I'm not going to be responsible for what is not mine."😂😂😂
Birb ain't gonna step up to be no stepmom
That schuld be good IDEA for our GUVERMANT ,,first take care of your CITIZENS before they accept IMIGRANTS or refiugise from different parts of the world.
They schuld WATCH that VIDEO every single day in parlament😡😡😡😡🤢
It’s nice when you get your meal delivered right to your home. 😅
Yeah but the cuckoo will usually try to fool the host by throwing out one of their own eggs, so there's a cost.
@@butmunchass Some have developed the ability to create eggs that closely resemble the ones they parasitize in color and spotting, but they'll be bigger. Hard to believe.
😂😂😂😂 نعم
And for free 🤩
Birddash
She saved her babies, so glad ❤
That is, assuming the cuckoo's parents didn't see that. Some brood parasites have been known to come back around to check up on their egg or chick from time to time, and vengefully destroy the host's eggs or kill the host's hatched chicks themselves if they find that their egg was destroyed or the resulting chick has died.
@13ased_Americansome birds tolerates and feeds the cuckoo chick knowing the fact that the cuckoo parent must be near watching
@13ased_AmericanThey're not evil. Just doing what it takes to survive.
@13ased_American The birds don't think like that. It's totally based on instinct, which has been hardwired into them. Do you think cuckoos learn the behaviour from their mothers? Obviously not, because they are raised by other birds.
@13ased_American They're fucking birds, Kevin
This mama bird is no fool. She’s for raising her own chicks, not an imposter chick which will usurp her nest.
Definitely a Republican bird. She has no tolerance for illegals in her nest.
do you know the species of the 'mama bird'? maybe it was the father. is it some sort of magpie?
Just like single mothers trying to cuck nice guys into raising another man's kid.
I don’t know.
@@embreis2257 It may be a bird we call blackcap.
Saved her babies and scored a nice nutritious meal! Great mama!
She saved her chicks. Birds don't have babies.
@@kathleenevans1201chicks are baby birds. So yes, they are babies.
@Chiffawndue No, they are not babies. Babies are born to human mothers. Chicks are hatched out of an egg. So, no, chicks are not babies.
@@Chiffawndue Birds are hatched from eggs. Humans are born. Birds are chicks, not babies.
@@kathleenevans1201 I'm assuming English your first language, and that's okay. Baby is, by English definition, used to describe the young of any creature, not just humans. Sure, other creatures may have specific names for their babies, but that does not mean the word baby fails to describe their young.
It would be like saying the word "moon" cannot describe the moons of Mars, because the moons don't orbit Earth. That's just not how it works.
So in short, the word baby is being used correctly, as it means the young of any creature.
All kind of birds are know for having a very good memory, she probably suffered a previous attack for the first time and it will not fall in the same trick again. Birds never forgets anything
Monkeys nevers craps
This is, absolutely, not the case. Most birds will fall for this if the eggs look close enough to their own. Some will even fall for it when they don't.
This just happens to be a case where a cuckoo that's eggs look more like robins was not able to find a robin nest to lay in. So she picked what was available, and it was ill suited for blending in.
Mama Bird- “Damn it! Someone dropped off a DoorDash order at the wrong house! Oh well, I guess I’ll just eat it myself.” 😂🤣
This is a very intelligent and protective mother .
I’m glad some birds don’t fall for the Cuckoo birds con. She saved her babies from either being pushed out of the nest or dying of starvation.
Assuming the Cuckoo Mafia (yes, that's a real tactic) doesn't make the mama bird pay dearly for resisting.
I know it's brutal what cuckoo chicks do... But do we want to be without cuckoos? I don't want them to go extinct..
@@yellard6785 I don’t either but still… cuckoo’s are annoying
@@sonicspyrofan5237 I quite like the sound they make.. Reminds me of lazy summer days relaxing in the country.. 😊
And not all species of cuckoo do this.
Meep-Meep!
Usually Cuckoos eggs mimic a particular bird species in their environment. Seems like this one was a robin mimic. It might've been forced to lay its egg in an ill-suited nest due to a lack of Robins in the area.
Aren't robins particularly good at spotting fakes? Pretty sure there were studies where a nearly identical egg was placed in a nest and the mother found it immediately. Might not have been robins though.
Or has someone just put it in for the sake of a video...I doubt very much that was the egg of a cuckoo.
People torture turtles faking rescue videos. You think nobody would put a egg like this for views?
That’s kinda cool!
@@BeasleyStreetThat’s exactly what I was thinking
That smart bird said "Thanks for lunch, your parasite tastes phenomenal"
Finally a smart bird flipped the situation to breakfast in bed.
Awesome! I hope she enjoyed eating the egg!
Parasite egg made the mistake of looking nothing like the other eggs. Usually it’s at least a similar color or pattern
Sadly it usually works since most Birds are mind-meltingly stupid. Even when the Cuckoo hatches and grows to be bigger than the Parents, most Birds do not suspect a thing.
They lay their eggs in all types of birds, so the eggs are bound to be different.
@@saudmubarak1542 one reason some birds color their eggs as we see here.
@@bruanlokisson8615
What does it mean for a bird to color its eggs?
@@l.n.3372 the colors of an egg are applied as the egg passes through the mother. the coloring is mostly done so mama bird knows that the eggs are hers and not some other breed. Some parasite birds, cuckoos are one type, color their eggs to match their preferred host species egg colors.
This parent bird is smart 👍 I tried to get rid of strange eggs, but it's hard! It's really smart to make a hole in the egg and nourish it👍👏
Exelente ,felicitaciones al Pajaro que reconoce que no es suyo.
You're a parent bird? xD
And the parent bird got some nourishment, good deal! Here's hoping the cuckoos do not return. 😊
@@nyancat8828 some seem to think they are, bestowing all sorts of human reasons, behaviors onto what the birds and chicks are doing
@@nyancat8828 A bird with an avian adaptive smartphone! And that ain't chicken feed. Haha. 😅
Well, that egg could not be more obvious 😂😂😂
Lots of cuckoos have evolved to lay eggs similar to the eggs of their chosen species to dump their eggs on.. This one seens to be an exception.. Possibly a young inexperience cuckoo or a lack of alternative nests..?
@@yellard6785Most likely just a fake video, author planted the egg of some bird (Maybe not even cuckoos) himself and filmed it. There are no untrained young cuckoos here, they make perfectly camouflaged eggs instinctively, they do not learn it.
@@yellard6785Most likely a fake video, the author himself planted the egg of some bird that may not even be a cuckoo and filmed it on video.
There are no inexperienced cuckoos, this is not what they learn, they make perfect-looking eggs for the eggs of another bird instinctively. They study the eggs of another bird, and after their body masks the egg itself, after which they wait until the parents fly away or distract them, fly into the nest, throw out one of the eggs and replace it with their own, which looks like almost an exact copy of other eggs.
@@yellard6785Most likely a fаkе vidео, the author himself planted the egg of some bird that may not even be a cuckoo and filmеd it on vidео.
There are no inexperienced cuckoos, this is not what they learn, they make perfect-looking eggs for the eggs of another bird instinctively. They study the eggs of another bird, and after their body masks the egg itself, after which they wait until the parents fly away or distract them, fly into the nest, throw out one of the eggs and replace it with their own, which looks like almost an exact copy of other eggs.
@@yellard6785Most likely a fаКе v|dео.
There are no inexperienced cuckoos, this is not what they learn, they make perfect-looking eggs for the eggs of another bird instinctively. They study the eggs of another bird, and after their body masks the egg itself, after which they wait until the parents fly away or distract them, fly into the nest, throw out one of the eggs and replace it with their own, which looks like almost an exact copy of other eggs.
How wonderful I’ve waited 60years to see that. At last a mother that won’t be fooled by a lazy imposter.
You know what evolution is, right? Old world cuckoos literally cannot do anything different.
Mama birb should've thanked the cuckoo for the food delivery
*free food delivery
Умная птичка.Позаботилась о своих малышах👍
Matalino ang mother bird na ito.Good job👏
I know that’s right! Mamma bird was like I’m not giving up my kids for a big ugly ass cuckoo!🤷🏽♂️
Her Smartness SAVED the Life of her Chicks. Thanks MOM ❤️❤️
Those future chicks have a great mother.
not only did she remove it she devoured it, not exactly what mama cuckoo had in mind
영상의 부모새는 육아경험이 풍부하거나 그전에 뻐꾸기에게 탁란을 당한 경험이 있어서 두번 실수는 하지않은듯
They're not children🙄
@ginapilkington3204 They are children, the comment simply states that the parent bird either had a lot of experience or previously lost an egg due to a cuckoo bird. Plus, the baby birds are still in the egg, so they are technically children.
Она спасла своих будущих птенцов. Молодец! 👏👏👏
Hope all mother birds are smart like her
That would make the cuckoo's extinct.
@@IAmGonnaPutSomeDirtInYourEye1 good then
@@guycha0s380 😭😭😭😭😭 please no. 🙏 i am a cuckoo
@@IAmGonnaPutSomeDirtInYourEye1 Smart Birds: I missed the part where that’s my problem
So beautiful watching it
Stranger Danger become Stranger Dinner 😂
She saved generations😂
As all great parents should do.
災いを未然に防ぐ賢いママ、尊敬。😊😊😊
たまごの味…しっかり丁寧に味わってますね笑
Наконец-то, умная птичка! Распознала, что чужое яйцо 👏
Anda ....que decir de otra persona!!!!!
😂 에구 똑똑한 엄마네!!!
맨날 제 새끼 다 죽인 남의 자식 먹여 살리는 것만 보다 속이 다 시원하고...도 좀 짠하네! 감사합니다
They usually make their egg look like their target's this one isn't even close... lol
Probably specialized on parasitizing a different species of bird but couldn’t find any active nests.
@@ShadowFox1412 yeah their parasitism isn't advanced enough to mimick any species of bird, outside of maybe copying their calls.
我认为鸟妈妈很感激食物的礼物。
It's so satisfying video 👌👌👌💕
这位鸟妈妈太聪明了😂😂😂😂
Brave parent😇
Those chicks have a great mother.
в натуре очень умная птичка 💓
새끼들을 사악함에서 구했네요~ 똑똑한 어미새 홧팅!! 새끼들 잘 키우고 행복하게 살아라~ 새끼도 엄마 닮아 똑똑 할거야~
Cubs????
@@ezstreete yes. For some reason bear comes out of eggs with a low possibility.
@@yada_whatamidoingherei used to call it bear chicks..
And dad. Join the movement to include fathers, as in many breeds, BOTH parents are identical, or close enough to require expert observation. Both brood, feed, and tend nest equally. So let's quit these comments by people who don't know any better and claim mother this and mother that, when half the time it's dad, not mom. Doesn't mean all species, as some deliver to mom. Raptors, totally different, some smaller breeds will have both. One creator in the uk had a male do it all, when the female never returned, and the creator has also gotten others involved in foster parenting, even barn owls! Quite Interesting. So don't be like the uninformed and always go far afield in their ignorance in praising mum for everything good, just short of sainthood, and just enjoy what many have never seen before, that in itself
is beyond wonderful.
Кака умница, правильно поступила. Если кукушка со стороны не наблюдает, всё обойдётся👍
แม่นกฉลาดมากแม่ต้องมีประสบการณ์ที่ลูกไม่เหลือถูกไอ้ลูกกาฝากจัดการลูกๆของเธอ เป็นกำลังใจให้ค่ะคุณแม่😂😂😂😂
Bird: Oh sweet someone left me some free lunch.
Cuckoo: No I gave you that to raise.
Bird: To raise my energy.....
Mother bird: This isn't my egg get outta here intruder/parasite!
好聰明啊！😊
終於見到一隻聰明的鳥媽媽
Some birds recognize this some don't. The big problem is the cuckoo shoving the eggs, and chicks out of the nest, sometimes with parent bird watching it happen, being puzzled, doing nothing. The cuckoo causes such a disruption that brooding ceases because 'the thing' never rests.
'The Thing' 😮
មេបក្សីនេះឆ្លាតមែន
you go smart momma enjoy the meal delivery 😂
How much clean they keep their nests ..remarkable
It is good to know that schemes of deception do not always work
Cuckoo: hehe... Your gonn araise my childre-
Mama: ooooo free fried egg!
Cuckoo: (screaming inside)
the other bird was like "I knew this day would come, I was hoping for it"
This bird watched Sesame Street.
"One of these things is not like the other"
Four. Four eggs. Ahh-ahh-ahh!
Умничка птичка удача вам благадарю за видио.
smart mama!
Clever bird, makes sense they'd have investigative instincts to protect themselves from brood parasites.
Finally, pure justice in action! Mom was no fool!❤
Умная птица👉💯👍🏻
Хорошая мамочка! И наелась, и родных птенцов спасла от гибели!
Bird: “Hmm…I am not a man in the West who raises the children of other men, only to have his house and home taken away from him in the Divorce courts”.
the mother now has eaten her babies' enemy!
Brown-breasted Bulbul's mom seems to know it's evil 👏
Just like his cousin the red chick one
Thank you!
This bird has a white body. It might be a blackcap.
There is no "evil" in nature
Even got a free meal delivery.
So happy to see this.
thats a lot of free protein for that bird all things considered
Imagine the amount of energy the cuckoo mother put into producing that egg, and then it went pfft
새도 엄마가 똑똑해야 자기 새끼를 지킬수있음!
Nhận ra có người lạ 😊thật vui thay
Хорошо , что съела паразита . Умничка.
I'm so happy today mama bird destroyed that egg before it could hatched and kill her babies.🎉🎉🎉
She's gonna have chicks!
Those future chicks have a great mother.
It's crazy to think how entire species of bird are parasitic. Imagine a species of human that survived only by sneaking into hospital nurseries and inserting their babies into the nursery, then when the nurse gives the baby to the parents they go "will you look at that, theres an extra one in here!" And because you don't quite know which one its yours, you take both home
It'd be worse, the Cuckoo chicks usually hatch earlier and are generally larger than the host birds.
So they will almost always kill off the other chicks by pushing the other eggs out of the nest.
Okay but in the grand scheme of things all lifeforms that don't simply depend on photosynthesis are parasitic.
They're Democrats/
That’s the changeling mythos, where faeries would replace human babies with theirs.
Happened somewhere. Actually..
こういうのは低確率でまれにあるな
托卵ばれるの
鳥だって進化してるし
もし生まれたら大人になるまで育てる習性あるからな
他人の子供を育てるの嫌ですよね…しかも生意気に雛を追い出して自分だけ育ててもらおうとしているとか
A smart mother ‼️ This is the first time I see a bird realizes and saves her chicks from certain death ‼️
Mama bird : Who gave me this free food to me?
Doordash 😄
Smart bird tried to pick it and throw outside but it couldn’t get in it’s mouth so that pecked open and reduced the weight so it can get rid off, how it came back and cleaned up the nest is priceless!
👏👏👏👏👏👍🐦
Here comes the Cuckoo mafia
不是所有的鸟儿都是这么聪明的
Молодец птичка, догадалась раздолбать кукушкино яйцо, заодно и покушала и выкинула будущего убийцу.
Como debe ser asi tendrian que hacer todas las mamas!!!
Very smart mum 🥇♥️☺️
And the award to the best mother goes to…this bird right here….super smart super protective ….super super amazing!!!! 👍🏽💯👍🏽💯👍🏽💯
Yeeees!! Smart mama, good job!! Eat that egg up before it hatched
Mama Bird be like: Thanks for the delivery meal cuckoo bird.
so so so smart. love this bird. this bird just made my day.
That is one smart mama bird!
Very wise mama bird--🎉🎉🎉
Me encantó el video ella sabe cuidar sus polluelos no quiere ningún usurpador ❤
Good job ... But why cuckoo not hatching its own egg ?
巢寄生（Brood parasite），又稱托卵寄生，是某些鳥類將卵產在其他鳥的巢中，由其他鳥（義親）代為孵化和育雛的一種特殊的繁殖行為。
某些昆蟲也有巢寄生行為。
有些巢寄生的鳥類喜歡找與其親緣關係近的鳥作為宿主，比如非洲維達雀亞科的鳥；而另外一些則選擇其它科的與之生活習性大致相近的鳥類為宿主。無論是種間的還是種外，寄主都要選擇與自己孵化期和育雛期相似、雛鳥食性基本相同的宿主。
寄主通常只在宿主巢內產一枚卵，有時也會產下多枚。寄主多是在宿主開始孵卵前產卵，如果宿主的卵已開始孵化，寄主常常會把這些卵吃掉或扔掉，如牛鸝會用喙和爪在宿主卵上打孔，使宿主卵孵化失敗並延長宿主的孵卵時間。寄主產卵的時間往往十分短暫，如斑翅風頭鵑（Clamator jacobinus）在宿主的巢中產一枚卵僅需5秒。
在長期的適應選擇中，寄生卵的大小、顏色、卵斑等特徵都與其特定的宿主相似。多數寄主的卵比非寄生的同類的鳥卵要小，或與宿主的卵大小相近。同種的巢寄生者由於宿主不同，所產卵的斑點、顏色也不同，如不同種群的杜鵑，所產的卵因宿主卵的差異而各有不同。寄主的卵還通常較結實，卵殼較厚。
寄主的雛鳥通常較宿主的雛鳥出殼早，一些巢寄生的雛鳥破殼後便本能地將宿主的卵拱出巢外，還有的如響蜜鴷的雛鳥在頜上長有尖鉤，一出巢就用它把巢內宿主幼鳥殺死。此外寄主鳥生長發育迅速，會占有宿主餵食的大部分。
巢寄生對宿主種群的影響大小不一，除黑頭鴨等少數寄主不會嚴重影響宿主繁殖，多數情況都會使宿主鳥繁殖成效降低。
為了繁衍，宿主鳥也發展出一套反寄生的行為。比如許多雀形目的鳥，對於進入其領地的潛在巢寄生者會予以驅趕。宿主鳥築巢時會選擇更隱秘的地方，離巢時還要對卵加以掩蓋，並儘量減少離巢時間。宿主一旦識別出寄生卵，就將其扔出或棄巢。有研究表明，經常被杜鵑巢寄生的宿主鳥對杜鵑卵的識別能力很強，而沒有杜鵑寄生的地區，如冰島的鳥對杜鵑卵的識別能力就很差。
有大約5個科，80多種鳥有典型的巢寄生行為，數量占全世界鳥類總數的1%。
杜鵑科
大杜鵑是人們熟知的巢寄生者，據統計，它能把卵寄生在125種其他鳥的巢中。
文鳥科
非洲的維達雀亞科全是巢寄生者，每一種的寄主相對穩定，主要是梅花雀科的鳥類。
擬鸝科
南美洲分布的擬鸝科鳥多是巢寄生者，其中褐頭牛鸝能在200多種鳥的窩中產卵。[1]
雁鴨科
黑頭鴨是這一科中唯一的巢寄生者，寄主有其它雁鴨科、秧雞、䴉類、鷺類的鳥
響蜜鴷科
這一科的鳥主要生活在非洲撒哈拉沙漠以南的地區及亞洲的熱帶雨林中，全部為巢寄生鳥。
剛出世的布穀鳥會依靠不同的「卑鄙手段」以確保它們就獲得最優質的營養。
1, 比起一般的鳥類更早長出尖嘴，在鳥巢中四處擺動它尖銳的嘴巴，傷害其他鳥蛋或雛鳥。
2, 它們會將其他同巢未出生的「兄弟姊妹」(其他鳥蛋)推出巢外，集中父母的注意力及營養。
3, 在「養母」帶著食物回來的時候，它會用最響亮的叫聲不停大叫以示餓意
但其背後的意義是「你需要優先給我食物，如否我的聲音將吸引其他捕食者過來！」以上的內容都係由書本「自私的基因」入面有提及到，
當然，我們不能以人類的道德倫理量度動物世界的平衡及生態，
弱肉強食是大自然的不二法則，
有的動物靠的是明刀明槍，有的動物是靠團體生活，
有的動物則像杜鵑鳥一樣，靠的是「輕資產」，將養育下一代的責任轉嫁給其他人。雖然布穀鳥的生存方式相當於一個無賴「四處留種，不擔起父母的責任，損人利己」
然而對於農夫來說，它是一個很好的朋友，
因為它的主要食糧是害蟲，例如蝗蟲、松毛蟲、松針枯葉蛾等對農作品有害的害蟲
Good mom with sharp eyes.
Birds evolving to recognize parasites in their nests, or bird thought cuckoo left a snack.
Smart mom, she saved her little ones from being thrown out/eaten. 🩷🩷🩷
"I was born in the dark but it wasn't yesterday, this did NOT come outta me."
This ain’t my egg. It’s my breakfast 🍳
Bravo por los hijos k crecerán muy bien
Bird is smart
Realized that 1 egg was different
The absolute struggle of having no hands though, you can even see the annoyance trying to use only a beak!
Mother bird: Nice try Diddy.
Smh I've stooped to Diddy jokes
Thank you for this video. Now I can sleep in peace. Being pregnant n finding out about this awful birds made me restless. Thank you mother for eating that egg n throwing it out to save your kids. Nature right. What a world 🌍
Ese pájaro he visto que mata polluelos más grandes .... Me alegra mucho ver cómo se alimenta este pajarito inteligente ❤❤
Inquilino indesejável
Smart mother❤❤❤
Thank you for the meal mother cookoo…❤❤❤😂😂 nest delivery!!!🤣🤣🤣