
You may know the fable: a thirsty crow drops stones into a jar to drink. In a 2014 experiment, scientists ____1____ this — crows dropped stones into a water-filled tube to get food. This reveals the amazing ____2____ of corvids (鸦科鸟) like crows and jays.
Corvids are expert at ____3____ food. One bird can hide thousands of seeds and find them months later. In an experiment, scrub jays (灌丛鸦) ate worms first, leaving peanuts, ____4____ they knew what they stored and when. When they knew no food would be available the next day, they stored more, showing they can ____5____ ahead.
Crows can recognize human faces. In an experiment, after a masked person ____6____ them, the crows later attacked only the person in that mask, completely ____7____ all other masks.They also tend to avoid places where they saw a dead companion, connecting such places with ____8____.
Tool use is another ____9____ skill. New Caledonian crows make hooks from sticks; Japanese crows drop nuts for cars to ____10____ open. Young crows play often, which ____11____the foundation for intelligence.
Their smartness is linked to social life. They raise young cooperatively, share food, and ____12____ against predators. Some form lifelong pairs, responding to each other’s ____13____.
微信用户 Jun 18, 2026 6:18:39 AM
Nice nice nice
!
微信用户 Jun 18, 2026 6:18:45 AM
Nice nice nice
!
微信用户 Jun 18, 2026 6:18:51 AM
Nice nice nice
!
肖贝贝 Jun 18, 2026 5:30:52 PM
One smile can warm another person's heart.
!
肖贝贝 Jun 18, 2026 5:31:25 PM
One smile can warm another person's heart.
!
肖贝贝 Jun 18, 2026 5:32:03 PM
What are you doing now?
!
宇航员 Jun 18, 2026 5:43:31 PM
One smile can warm other's heart.
!
宇航员 Jun 18, 2026 5:43:47 PM
One smile can warm other person's heart.
!
宇航员 Jun 18, 2026 5:44:15 PM
One smile can warm another person's heart.
!
宇航员 Jun 18, 2026 5:44:31 PM
One smile can warm another person's heart.
!
宇航员 Jun 18, 2026 5:45:08 PM
The prime of life is in one's twenties, galloping fast on a horse, seeing all the flowers under the sun
!
宇航员 Jun 18, 2026 5:45:55 PM
Life's like a play, so why not face it with a better attitude
!
小叶子萱 Jun 18, 2026 7:33:22 PM
A smile can light up another heart.
!
小叶子萱 Jun 18, 2026 7:33:39 PM
Zhang Linghe is so handsome, Zhang Linghe is so handsome.
!
小叶子萱 Jun 18, 2026 7:33:54 PM
Zhang Linghe is so smart! Zhang Linghe is so smart.
!
oUm2H1VG2MxI77tJq58Bs74Pz16Y Jun 18, 2026 7:47:10 PM
fghhgfffffffffdr
!
微信用户 Jun 18, 2026 10:10:23 PM
no problem
!
oUm2H1RXYhdcq8IZOow8tUsIVexE Jun 18, 2026 10:26:56 PM
Nnnnnnnnnn
!
oUm2H1RXYhdcq8IZOow8tUsIVexE Jun 18, 2026 10:27:02 PM
Nnnnnnnnnn
!
oUm2H1RXYhdcq8IZOow8tUsIVexE Jun 18, 2026 10:27:10 PM
Nnnnnnnnnnnn
!
微信用户 Jun 18, 2026 10:43:47 PM
jjjjjjjkkllkiiuytr
!
微信用户 Jun 18, 2026 10:43:52 PM
jjjjjjjkkllkiiuytr
!
微信用户 Jun 18, 2026 10:43:55 PM
jjjjjjjkkllkiiuytr
!
微信用户 Jun 19, 2026 5:39:08 AM
Your composition is really impressive. The structure is well-organized and your expressions are smooth. You use rich vocabulary and various
!
微信用户 Jun 19, 2026 5:39:13 AM
Your composition is really impressive. The structure is well-organized and your expressions are smooth. You use rich vocabulary and various
!
微信用户 Jun 19, 2026 5:39:19 AM
Your composition is really impressive. The structure is well-organized and your expressions are smooth. You use rich vocabulary and various
!
13778369527 Jun 18, 2026 8:54:02 PM
I’m I have just have have just been
!
13778369527 Jun 18, 2026 8:54:05 PM
I’m going to get the kids
!
13778369527 Jun 18, 2026 8:54:10 PM
I’m I have to be go back
!
依旧NB Jun 18, 2026 9:36:26 PM
OneSmileCewamcothrpersus..
!
17282380552 Jun 18, 2026 9:52:00 PM
Come on!I believe you can do it!
!