2. The world's heaviest living insect is an African beetle called Gryllus, which is as big as a man's hand and weighs about 100 grams.
3, a cocoon looks so inconspicuous, but it contains 1 kilometer of silk.
4. The smallest mammal is the white-toothed mouse, which eats three times its body weight every day.
5. Mayflies live for only six hours, but the eggs they lay take three whole years to hatch.
6, South America's tiger bird can make a call similar to that of a tiger, while the opossum can imitate the sound of a lion to perfection.
7. The male silkworm moth has an unusually sensitive sense of smell, and can detect a female silkworm moth 10 kilometers away.
8. The blood of lobsters is blue.
9. Moles are small, but they can dig a tunnel 76 meters long in one night.
10. The hummingbird is a good flyer, but cannot walk.
11. The crocodile is fierce, but it is color-blind.
12. The elephant has a particularly acute sense of hearing and can catch the footsteps of a mouse.
13. An Asian fish can live out of water for a whole week.
14. The African antelope has the ability to sleep under water.
15. In Africa, a hummingbird, often mistaken for an insect, is less than 2 centimeters long and weighs only 2 grams.
16. Madagascar is home to the bonobo monkey, which is as short as a mouse, but can jump as far as 3 meters at a time.
17. In order to adapt to the arid climate, the Makutou tree in the American desert has a well-developed root system that can penetrate 33 meters into the ground.
18, the largest fruit is the double coconut, produced in Africa's Seychelles Islands, each weighing about 20 kilograms.
19, a kind of palm tree in the Philippines to grow nearly 40 years will flower, can bloom 50 million flowers at the same time, composed of "fire tree silver flowers" magnificent spectacle, but soon all withered.