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另类母子情

另类母子情# Animals - 动物园

I*i2014-09-07 07:09

1 楼

树上有一之刚出窝的Brown-headed Cowbird在叫，估计是肚子饿了
妈妈在哪？
别急，妈妈来了
母子亲密合影
很和谐，是不是呢？
其实呢，大家可能都知道，Brown-headed Cowbird专门把蛋下在别的鸟的窝里，让别的
鸟替自己孵化养育自己的子女。照片里的养父母是Song Sparrow，看，养父母很负责啊
好几次看到养父母Song Sparrow亲口喂寄生鸟的画面，可惜都没照下来，只打到了在一
起的合影

h*t2014-09-07 07:09

2 楼

cowbird 下蛋到别的鸟窝、由别的鸟抚育后代这一绝招怎么传下来的呢？很奇怪。是否
cowbird 的父母后来又来认领它们的子女？但它们的子女又怎样认识父母呢？如果子
女和父母从来都不接触，小 cowbird 从那学来它们父母的本领？

h*h2014-09-07 07:09

3 楼

和杜鹃一样？

l*t2014-09-07 07:09

4 楼

赞!
寄生娃明显比其奶爸奶爸大很多啊

a*a2014-09-07 07:09

5 楼

真是不错。令人感动！

I*i2014-09-07 07:09

6 楼

Cowbird长大后就远离养父母，和同类一起生活了。具体怎么学会下蛋到别的鸟窝、由
别的鸟抚育后代这一绝招，我也不清楚，可能这一招不需要小时候学，长大后和年长些
同类们学也不迟，瞎猜的

【在 h*****t 的大作中提到】

: cowbird 下蛋到别的鸟窝、由别的鸟抚育后代这一绝招怎么传下来的呢？很奇怪。是否
: cowbird 的父母后来又来认领它们的子女？但它们的子女又怎样认识父母呢？如果子
: 女和父母从来都不接触，小 cowbird 从那学来它们父母的本领？

I*i2014-09-07 07:09

7 楼

对，差不多

【在 h*h 的大作中提到】

: 和杜鹃一样？

I*i2014-09-07 07:09

8 楼

可是奶爸奶妈似乎毫无察觉，视如己出

【在 l*t 的大作中提到】

: 赞!
: 寄生娃明显比其奶爸奶爸大很多啊

I*i2014-09-07 07:09

9 楼

鸟界的雷锋

【在 a***a 的大作中提到】

: 真是不错。令人感动！

h*t2014-09-07 07:09

10 楼

我做了些　homework
１.（英文资料来自　wiki）：
cowbird 因为要跟着牛群移动（cow + bird 由此得名），没办法只好将孩子托管于他
人。母 cowbird　先观察其它鸟不在窝时就溜进去赶紧下蛋，然后在一旁偷窥，如果
cowbird　的蛋没被其它鸟发觉，母　cowbird 就飞走了；如果cowbird 的蛋被发现和
移走，母cowbird 就大发雌威，寻机将寄宿家庭里的其它蛋一古脑儿全打烂。
These birds feed on insects, including the large numbers that may be stirred
up by cattle. In order for the birds to remain mobile and stay with the
herd, they have adapted by laying their eggs in other birds' nests. The
cowbird will watch for when its host lays eggs, and when the nest is left
unattended, the female will come in and lay its own eggs. The female cowbird
may continue to observe the nest after laying her eggs. If the cowbird egg
is removed, the female cowbird may destroy the host's eggs.
２.以下英文资料来自　nestwatch
http://nestwatch.org/learn/general-bird-nest-info/brown-headed-
Cowbird　先摧毁或移走宿主的一个蛋，然后再下自己的一个蛋。
小cowbird　孵蛋期短，先出世，先得到宿主鸟的照看。当宿主自己的小鸟出生后，由
于小cowbird　个头比其它小鸟大，所以它有优势抢到食物，这有可能使得宿主的小鸟
营养不良而夭折。
Once she has found a suitable host, the cowbird will sneak onto the resident
bird’s nest when it is away, usually damage or remove one (or more) egg,
and replace that egg with one (or more) of her own。
The foster parents then unknowingly raise the young cowbirds, usually at the
expense of their own offspring. Cowbird eggs require a shorter incubation
period than most other songbirds and thus usually hatch first. Cowbird
nestlings also grow large very quickly. These advantages allow them to
command the most food from their foster parents, usually resulting in
reduced nesting success of the host species.
This cowbird egg (top, left) was laid in an Eastern Bluebird's nest, inside
a nest box.把蛋下到蓝鸟窝里
Note the cowbird (being fed) has a very red gape and has opened its eyes,
setting it apart from the Wood Thrush nestlings with whom it shares this
nest.　cowbird 幼鸟先长大，率先张开眼睛，而宿主的幼鸟眼睛还没发育好
大家看这　cowbird 坏不坏？

I*i2014-09-07 07:09

11 楼

学习了，赞科普

stirred

【在 h*****t 的大作中提到】

: 我做了些　homework
: １.（英文资料来自　wiki）：
: cowbird 因为要跟着牛群移动（cow + bird 由此得名），没办法只好将孩子托管于他
: 人。母 cowbird　先观察其它鸟不在窝时就溜进去赶紧下蛋，然后在一旁偷窥，如果
: cowbird　的蛋没被其它鸟发觉，母　cowbird 就飞走了；如果cowbird 的蛋被发现和
: 移走，母cowbird 就大发雌威，寻机将寄宿家庭里的其它蛋一古脑儿全打烂。
: These birds feed on insects, including the large numbers that may be stirred
: up by cattle. In order for the birds to remain mobile and stay with the
: herd, they have adapted by laying their eggs in other birds' nests. The
: cowbird will watch for when its host lays eggs, and when the nest is left