1. you have to do first part of question by own No, all snakes are not poisonous. Some of the poisonous snakes are Indian Cobra, Common Krait, Russell's Viper and Saw-scaled Viper. 2.There are many ways to find out whether a snake is harmful, some of which are listed below. The poisonous snakes have • Slit eyes (except coral snakes) • Triangle-shaped head 3.Some facts about snake charmers are as follows: • Delhi government's amnesty scheme gave licence to many snake charmers rendering it legal to practice this trade. • The snake charmers belong to the Nath sect and are followers of **** Shiva or Bhole Nath. • The skills of catching snakes are taught to them in their childhood. • The snakes usually lie about in the open in the snake charmers' colonies. • Small boxes, filled with sand, are also set up for the snakes there.