The Boidae, commonly known as boas or boids, are a family of nonvenomous snakes primarily found in the Americas, as well as Africa, Europe, Asia, and some Pacific islands. Boas include some of the world's largest snakes, with the green anaconda of South America being the heaviest and second-longest snake known; in general, adults are medium to large in size, with females usually larger than the males. Six subfamilies comprising 15 genera and 54 species are currently recognized.
Rat snakes are members – along with kingsnakes, milk snakes, vine snakes and indigo snakes – of the subfamily Colubrinae of the family Colubridae. They are medium to large constrictors and are found throughout much of the Northern Hemisphere. They feed primarily on rodents. Many species make attractive and docile pets and one, the corn snake, is one of the most popular reptile pets in the world. As with all snakes, they can be defensive when approached too closely, handled, or restrained. However, rat snake bites are not dangerous to humans. Like nearly all colubrids, rat snakes pose no threat to humans. Rat snakes were long believed to be completely nonvenomous, but recent studies have shown that some Old World species do possess small amounts of venom, though the amount is negligible relative to humans.
Kingsnakes are colubrid New World members of the genus Lampropeltis, which includes 26 species. Among these, about 45 subspecies are recognized. They are nonvenomous and ophiophagous in diet.
Barkudia insularis commonly known as the Madras spotted skink is a critically endangered limbless skink which was described in 1917 by Nelson Annandale and rediscovered in the wild in 2003. Little is known about the species but it was previously believed to be found only in the mangrove habitats near Barkuda Island in Chilka Lake, Odisha, India. Later observations in adjoining parts of Odisha indicate a larger range within the state. The lizard looks like a large earthworm and lives in the subsoil and probably feeds on small arthropods.
The Aesculapian snake, is a species of nonvenomous snake native to Europe, a member of the Colubrinae subfamily of the family Colubridae. Growing up to 2 metres (6.6 ft) in length, it is among the largest European snakes, similar in size to the four-lined snake and the Montpellier snake. The Aesculapian snake has been of cultural and historical significance for its role in ancient Greek, Roman and Illyrian mythology and derived symbolism.
Elaphe is a genus of snakes in the family Colubridae. Elaphe is one of the main genera of the rat snakes, which are found in many regions of the northern hemisphere. Elaphe species are medium to large constrictors by nature. Although all of the species in Elaphe are nonvenomous, bites from rat snakes are still irritably painful and can potentially cause bacterial infections, especially due to the saliva.
Amphiesma monticola, also known as the Wynad keelback, is a harmless colubrid snake species endemic to the Western Ghats of India, where it has been recorded in the Kodagu and Wayanad regions.
Hardwicke's rat snake, also known commonly as the glossy-bellied racer, Gray's rat snake, and the spotted bellied snake, is a species of snake in the family Colubridae. The species is native to Asia. There are three recognized subspecies.
The Vellore bridle snake is a species of snake found in southern India and Sri Lanka. Bridle snakes are so named because of the resemblance of their slim bodies to the reins or 'bridle' used to control horses.
The common trinket snake is a nonvenomous constrictor species of colubrid snake native to south Central Asia.
Lycodon aulicus, commonly known as the Indian wolf snake, is a species of nonvenomous snake found in South Asia and Southeast Asia. Early naturalists have suggested its resemblance to the venomous common krait as an instance of Batesian mimicry.
Rhabdophis plumbicolor, known as the green keelback or lead keelback, is a species of nonvenomous snake in the family Colubridae native to parts of the Indian subcontinent.
The checkered keelback, also known commonly as the Asiatic water snake, is a common species in the subfamily Natricinae of the family Colubridae. The species is endemic to Asia. It is non-venomous.
Sibynophis subpunctatus, commonly known as Duméril's black-headed snake or Jerdon's many-toothed snake, is a species of nonvenomous colubrid snake endemic to Bangladesh, India, Sri Lanka, and Nepal.
The purple-red earth snake is a species of nonvenomous shield tail snake, endemic to southern India. No subspecies are currently recognized.
The Texas rat snake is a subspecies of the black rat snake, a nonvenomous colubrid. It is found in the United States, primarily within the state of Texas, but its range extends into Louisiana, Arkansas and Oklahoma. It intergrades with other subspecies of Elaphe obsoleta, so exact range boundaries are impossible to distinguish. The epithet lindheimeri is to honor the German-American naturalist Ferdinand Jacob Lindheimer, who collected the first specimen in New Braunfels, Texas.
Elaphe carinata, the king ratsnake, is a species of Colubrid snake found in Southeast and East Asia.
Brachyophis is a monotypic genus created for the rear-fanged venomous snake species, Brachyophis revoili, commonly known as Revoil's short snake, which is endemic to Eastern Africa. Three subspecies are recognized as being valid.
Senticolis is a genus of nonvenomous snake in the family Colubridae. The genus Senticolis is monotypic, containing the sole species Senticolis triaspis, also known as the green rat snake. The species is endemic to Central America, Mexico, southern Arizona, and southern New Mexico.
Uropeltis shorttii, also known commonly as the Shevaroy Hills earth snake and Shortt's shieldtail snake, is a species of non-venomous snake in the family Uropeltidae. The species is endemic to the southern Eastern Ghats of India. This species was first described as Silybura shorttii by British naturalist Richard Henry Beddome in 1863. It is found only in the Shevaroy Hills of Salem district in Tamil Nadu state in South India. For a long time, this species was misclassified into Uropeltis ceylanica, a snake endemic to the Western Ghats, till a recent taxonomic study proved it to be a distinct species with a very narrow geographic range. It is a burrowing snake, presumed to be nocturnal, feeding on soft-bodied worms. It becomes active during the rains. U. shorttii has most recently been assessed for The IUCN Red List of Threatened Species in 2019, and is listed as "Critically Endangered" under criteria B1ab(iii).
