10. The poison dart frog is less than 5 cm long and can kill people easily. It is said that it can produce enough toxin to kill 10.

9. African bison generally weigh more than 1500 pounds. If thousands of people rush to you, you may not see the sun the next day.

8. Polar bear, its huge claws can easily make your head fall to the ground.

7. Elephants, more than 500 people die from elephant attacks every year.

6. Australian saltwater crocodiles are motionless in the water, waiting for their prey to come to the door, and they can kill their prey in the blink of an eye.

5. African lion, it is the most perfect predator.

The great white shark, when it smells blood, will go into a crazy state. As many as 3,000 teeth can tear up almost anything moving in the water.

Australian box jellyfish, it has as many as 60 tentacles, and the toxin of each tentacle can kill 60 people.

2. Asian cobra, more than 20 thousand people die from its teeth every year.

1. Mosquitoes carrying and spreading parasites are the cause of 2 million deaths every year.