Genus · Colubridae
Cryophis
The genus Cryophis contains a single species. It is not considered dangerous to humans.
About cloud forest snakes
A little-known montane colubrid built for the cool, misty forests of southern Mexico and Central America.
Cryophis is a small genus in the family Colubridae, the largest and most diverse snake family on Earth. It currently holds a single recognized species, Cryophis hallbergi, often called Hallberg's cloud forest snake. The name itself points to its home: it is a creature of cold, high-elevation cloud forest rather than the lowland tropics most people picture when they think of Central American snakes. Within the broad colubrid family it sits among the New World forest and leaf-litter colubrids, a group of slender, agile, non-constricting or lightly constricting snakes adapted to humid, vegetated habitats.
Members are known from the wet montane and cloud forests of the highlands of southern Mexico, in the region of Oaxaca, where persistent fog, dense leaf litter, and cool temperatures define the environment. In general terms, a snake of this group is a modestly sized, slender-bodied colubrid with smooth or weakly keeled scales and the typical alert, terrestrial-to-semi-arboreal build of forest colubrids. Because the genus is so rarely encountered and poorly documented, precise field marks are best confirmed against regional herpetological references rather than assumed; the safest identification cue is context, a small forest snake found in high, wet Mexican cloud forest.
Like the great majority of colubrids in this lineage, Cryophis is not considered dangerous to people. It has no large front fangs and no medically significant venom, so it is best understood as a harmless forest snake. Even so, the standard rule for any wild snake applies: do not handle snakes you cannot positively identify, leave them undisturbed, and let them move off on their own. If anyone is ever bitten by an unidentified snake and symptoms develop, contact emergency services or US Poison Control at 1-800-222-1222 rather than waiting. As a cloud forest specialist, its real significance is ecological. Snakes of this group play their part in the leaf litter food web as predators of small prey, and like many high-elevation specialists they are sensitive to habitat loss, which makes the conservation of intact montane forest central to their survival.
Cryophis belongs to the Colubridae family (Colubrids). The largest snake family, and the one most snakes you meet belong to. Typically round pupils, a head only slightly wider than the neck, and no heat-sensing facial pit or rattle. Scales may be smooth and glossy or keeled and matte depending on the species.
Danger: Almost all colubrids are harmless. A small number are rear-fanged with medically significant venom, the boomslang and the twig (vine) snakes of Africa being the dangerous exceptions. Most colubrids will flee or bluff rather than bite.
All species (1)
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