A cobra can traverse water. If It can find a nearby object, A cobra will hide under it, surprising any victim who passes by. It is part of the large family of serpents. It has no limbs. A cobra cannot pick up objects. It is able to lay eggs. It is poisonous if eaten. It is a carnivore.

Darzee and his wife only cowered down in the nest without answering, for from the thick grass at the foot of the bush there came a low hiss-- a horrid cold sound that made Rikki-tikki jump back two clear feet. Then inch by inch out of the grass rose up the head and spread hood of Nag, the big black cobra, and he was five feet long from tongue to tail. When he had lifted one-third of himself clear of the ground, he stayed balancing to and fro exactly as a dandelion-tuft balances in the wind, and he looked at Rikki-tikki with the wicked snake's eyes that never change their expression, whatever the snake may be thinking of.

'Who is Nag?' said he. 'I am Nag. The great God Brahm put his mark upon all our people, when the first cobra spread his hood to keep the sun off Brahm as he slept. Look, and be afraid!'
Rikki-tikki-tavi, by Rudyard Kipling