Cobra

Cobra is a name of a snake. In English it is the common name for various venomous snakes. Most of those species are in the family Elapidae, and most of them can spread their neck ribs to form a flattened, widened hood.

The name "cobra" is short for cobra de capelo or cobra-de-capelo, which is Portuguese for "snake with hood", or "hood-snake".Oxford. 1991. The Compact Oxford English Dictionary. 2nd ed, Clarendon Press, Oxford. .

Cobras usually live in tropical and desert regions of Asia and Africa. In deserts, you find Arabian Cobra, Desert Black Cobra, and Egyptian Cobra. They are all highly venomous, with their neurotoxic venom that can be fatal to humans if untreated. Its bite causes paralysis and respiratory failure.  When feeling threatened, cobras can tilt back and flatten their heads into their warning posture. The rest of the time their heads are symmetrical and they look much like any other snakes.

Cobra may refer to:
 The genus Naja, the typical or "true" cobras (they raise the front part of the body and flatten their neck in a warning signal when alarmed). They are a group of elapids found in Africa and Asia. They include over 270 species, including Naja nivea, the Cape cobra, a medium-sized, highly venomous cobra which lives in biomes across southern Africa; Cleopatra's "asp" (the Egyptian cobra, Naja haje); and the Asiatic spectacled cobra Naja naja; and the monocled cobra, Naja kaouthia.
 Spitting cobras, a subset of Naja species which squirt venom from their fangs in self-defence.

Most so-called, and all "true", species of cobras belong to the family Elapidae

 References 

Category:Elapidae