Biologist Pepperberg once patiently trained a 6-year-old african grey parrot in Indiana, USA, and made him learn 40 English words and count. Parrot can use these words to tell the names, colors and shapes of dozens of objects. If these things are stacked separately, he can also tell how many things are in each pile.

2. Corals

Coral's mind is not simple. It is observed that coral itself is a "calendar", and they "draw" 365 stripes on the body wall every year, which is obviously one stripe a day.

Strangely, paleontologists found that coral painted 400 watercolors every year 350 million years ago. Astronomers tell us that the earth has only 2 1.9 hours a day, not 365 days a year, but 400 days, which is enough to prove the digital talent of corals.

3. snakes

When the snake crawls, it follows a digital sine function diagram, and the spine is connected section by section like a train, and there is a lot of room for activity between sections. If the plane coordinates of each segment are fixed and the starting point is the coordinate origin, it is found that the snake moves regularly according to the sine function curves of 30, 60 and 90.

4.spiders

The spider's "gossip" net is a complex and beautiful octagonal geometric pattern, and it is difficult for people to draw a symmetrical pattern similar to a spider's net even if they use drawing tools such as rulers and compasses.

5. Cormorants fish by cormorants in some places in China. The owner tied the cormorant's throat with a rope. When cormorants catch six fish, they are allowed to eat the seventh fish. This is a long-term agreement between the owner and the cormorant.