7. Javelin sand boa (Eryx jaculus)
Javelin sand boa, the next one on the list of most common non-poisonous snake species in the world is the only snake from the boidae family inhabiting Europe, and three subspecies are known. Apart from Europe (where it is found mostly in Mediterranean parts), it is present throughout the Middle East and northern Africa. The average length of this snake is 21 inches. Since it inhabits variable environments, the coloration also varies, being grayish, brownish, or reddish with a darker irregular line of blotches or bands on the dorsal (backs) side. Preferable habitats are drier warmer semi-desert lands, but also cultivated areas and coastal Mediterranean areas.