You'll notice that the places that you see blue veins are in areas where the skin is thin and the blood vessel underneath is pushing up on it stretching the skin over it. Light hitting the dark color of the vein underneath the skin, in combination with the skin itself is what causes it to appear blue in these areas.
Common krait. The common krait (Bungarus caeruleus), also known as Indian krait or blue krait) is a species of venomous snake of the genus Bungarus found in the jungles of the Indian subcontinent. It is a member of the big four species, inflicting the most snakebites on humans in India.
The reticulated python (Python reticulatus) is a species of python found in Southeast Asia.They are the world's longest snakes and longest reptiles, but are not the most heavily built. Like all pythons, they are nonvenomous constrictors and normally not considered dangerous to humans.he reticulated python (Python reticulatus) is a species of python found in Southeast Asia.