How does a wall lizard get rid of its tail?
How can a lizard detach its tail from its body
The wall lizard can detach a portion of its tail at its will. The bones in its tail are joined together lossely so that any portion of the tail separates easily from the main body. When the tail is separated it does not lose much blood because the ends of the blood vessels are almost sealed. It is therefore possible for the wall lizard to get rid of its tail.
Soon it grows a new tail. This confuses the enemy and the wall lizard escapes. The detached tail keeps waging for sometime. Crabs and lobsters are also able to get rid of their legs in a similar fashion. When a fish catches the leg and escapes. These are the defence mechanisms which enable some animals to survive.