That Reptile Blog – Reptile, Amphibian and Exotic Pet Care and Information

The pine, bull and gopher snakes are a complex of 15 species that range from southern Canada through the United States and Mexico to Guatemala.  Large (to 8 feet), powerful constrictors, most species are well-studied and long-established in captivity.  The Black Pine Snake (Pituophis melanoleucus lodingi) remains, however, elusive in the wild and less well-represented in captivity.

I first worked with this striking snake at the Staten Island Zoo, home to one of the country’s most impressive snake collections, and have longed to observe it in the wild ever since.

Classification and Description

The Black Pine Snake is a melanistic form of the northern pine snake (P. m. melanoleucus) that has been given subspecies status.  One other subspecies, the Florida Pine Snake (P. m. mugitus), has been described. The Louisiana Pine Snake (pictured here) is now classified as a distinct species, P. ruthveni.

Uniformly black (rarely dark brown) above and below, the Black Pine is stoutly built.  They average 5 feet in length, with a record of 6 ½ feet.

Range and Habitat

This rare snake is limited to a few localized sites in extreme eastern Louisiana, southwestern Alabama and, possibly, Mississippi.

It is found only in association with the sandy soils of Longleaf Pine communities, a threatened habitat.  The Black Pine Snake spends most of its life underground, within pocket gopher burrows or the root systems of rotting pines.

Status

This snake has an extremely limited range and is protected by the states in which it occurs.  In the past, habitat development and collection for the pet trade threatened its survival.  Captive populations are well-established in both zoos and the private sector.

Reproduction

Mating occurs in the spring, and 3-24 eggs are laid in June-August.  The clutch is hidden in a burrow or, less frequently, below a rock or log.  The young hatch in 64-79 days at 12-18 inches in length.

Diet

The natural diet has not been thoroughly documented, but likely includes deer mice, ground squirrels, chipmunks, cotton rats, rabbits, pocket gophers and ground-nesting birds and their eggs.  Prey is killed by constriction.

This and related species usually hunt below ground, within the burrows of gophers and other rodents.  Where space does not permit constriction, these powerful snakes kill rodents by forcibly pressing them against the burrow walls.  Often a number of animals will be killed in this manner before the snake stops to feed.

Pine snakes are much valued for their rodent-catching abilities and are sometimes released around farms and grain storage facilities.

Defense

When threatened, pine snakes put on an impressive display – the body swells with inhaled air that is expelled in a loud hiss, while the tail vibrates rapidly and the head is flattened.  The snake rears up in a series of ‘S” shaped curves and strikes repeatedly.  Most will flee if given the opportunity, but they do not hesitate to bite.

Husbandry

Black Pine Snake care is fairly straightforward, and follows that of rat snakes and other Colubrids.  Please write in for further information, or see Black Rat Snake Care and Natural History for husbandry guidelines.

Captive born specimens are usually calm, although the few I have worked with were a bit high strung.  Being largely fossorial in the wild, they are ill at ease if forced to remain in the open.  Even long term captives spend a good deal of their time within shelters.

Further Reading

You can read about conservation efforts for Black Pine Snakes in Alabama here.

 

Introduction
The snake world is full of species that “break the mold” – none more so than a Southeast Asian import that sometimes appears in the trade, the tentacled snake.

The care of this snake differs greatly from that of all others, and I’ll devote a full article to it shortly.  For now, I’d like to introduce the species to those of you who may be looking for a new challenge.

The Tentacles

The tentacled snake is unique among snakes in its possession of 2 fleshy tentacles (adjacent to the nostrils), the function of which is still unknown.  It has been suggested that they have a sensory function, detect water movement, lure prey or break up the outline of the head.

Unique Adaptations
This inactive snake resembles a water-logged root, an effect that is heightened by its color, rigid posture, habit of remaining anchored to sunken branches, and the covering of algae that grows on the scales.  It rarely swims, waiting instead for fish to approach closely before striking.

Completely aquatic, this species lacks the broad ventral scales of terrestrial snakes and is helpless on land.  When disturbed, it becomes rigid and immobile (in Thailand, it is known as the “Board-like Snake”).  The nostrils can be sealed to exclude water, and it may remain submerged for 30 minutes before surfacing to breathe.  Tentacled snakes are thought to aestivate by burrowing into the mud during droughts.

Tentacled snakes produce mild venom that is effective against the fishes and tadpoles upon which they feed.  The venom has not been shown to be dangerous to humans – the two people I know of who have been bitten experienced mild swelling that disappeared within a few hours.

Unusual Relatives
The subfamily to which this species belongs, Homalopsinae, contains a number of aquatic snakes that frequent unique habitats and hunt in unusual ways.  For example, the white-banded mangrove snake, Fordonia leucobalia, hunts crabs on tidal mud flats in Southeast Asia and northern Australia.  It is quite effective at overcoming this unusual prey – utilizing constriction and crab-specific venom before finally tearing off the crab’s legs.  It may even employ its oddly blunted teeth to help crush its victims’ hard shells – the only snake known to use teeth in such a fashion.

Further information on tentacled snake natural history, as well as a picture, is posted at:
http://eobasileus.blogspot.com/2008/02/utterly-outrageous-tentacled-snake.html