Zoological name: On the basis of the hood pattern three species
have been recognized: the spectacled or binocellate cobra (Naja naja), the monocellate cobra (N. kaouthia) and the black cobra (N.oxiana).
Distribution: The cobras are distributed in India, China, Nepal, Philippines, Sri Lanka etc. The spectacled cobra occurs in the peninsular India. The monocellate cobra is commonly distribute in eastern part of India and the black cobra is restricted to the extreme northwest of India.
Physical feature: The usual size varies from 1.3 m to 1.6 m. The monocellate cobra is generally olive, brown or black in colour. The spectacled cobra is yellowish, brownish or black above. An adult black cobra may be black or brown. The most distinct feature is the presence of a small 'cuneate' scale between the 4th and 5th infralabials. However, in rare cases it may be absent or there may be two small 'cuneate' scales. Another important character is its hood which is formed by the elongated ribs. The monocellate cobra has a single yellow or orange O-shaped mark on the hood. The other features include short and rounded snout, depressed head, large nostrils and glossy shields head.