How Much Do You Know about Grasshoppers?    [19-10-2012]
Untitled Document
Grasshoppers are interesting insects. But most children know very little about them. Did you know that grasshoppers existed long before dinosaurs? They started to live in the world when the first reptiles appeared on Earth. Today, they provide an important source of protein to people in many parts of the world!

Did you know that grasshoppers have ears on their bellies? They have simple hearing organ on the abdomen. As in most insects, grasshoppers¡¯ ears are simple structures. Using their ears, they can hear the songs of their fellow grasshoppers. Each species produces a different rhythm that allows for differentiation of its song from others.

Grasshoppers are wonderful jumpers. Thanks to their strong and powerful hind legs, they can jump very high. A grasshopper¡¯s hind legs function like miniature slingshots. When it wants to jump, the grasshopper contracts its large flexor muscles slowly, bending its hind legs. When the grasshopper is ready to jump, it relaxes the leg muscles, shooting its body into the air!

So, can grasshoppers fly, too? Yes, they can! Since they have such powerful jumping legs, sometimes people don¡¯t realize they have wings, too. In fact, grasshoppers are pretty strong fliers. They often use their wings to escape predators. Their jumping ability just gives them a boost into the air.
 
  Ãâó: ¾î¸°ÀÌ ¿µÀڽŹ® ŰÁîŸÀÓÁî (www.kidstimes.net)