Showing posts with label amazon rainforest. Show all posts
Showing posts with label amazon rainforest. Show all posts

Wednesday, 28 September 2011

Morelia viridis(green tree snake)

Morelia viridis, the green tree python, is a species of python found in New Guinea, islands in Indonesia, and Cape York Peninsula in Australia.

Morelia viridis
Description

Adults average 120–200 cm (3.9–6.6 ft) in length, with a maximum length (although rare) of about 7 feet. The supralabial scales have thermoreceptive pits.[2]

A mostly arboreal species with a striking green or yellow color in adults, the color pattern on this species can vary dramatically from locality to locality. For example, the Aru local is a vivid green with a broken vertebral stripe of white or dull yellow scales, the Sorong local is a bright green with blue highlights and a solid vertical stripe, and the Kofiau local is mostly yellow with varying highlights in white or blue. Cyanomorphs (blue morphs) are also known to occur but are not considered common at this time.[2] Juveniles are polymorphic, occurring in reddish, bright yellow and orange morphs.


Morelia viridis. Morph

neonate morelia viridis
Geographic range
Found in Indonesia (Misool, Salawati, Aru Islands, Schouten Islands, most of Western New Guinea), Papua New Guinea (including nearby islands from sea level to 1,800 m elevation, Normanby Island and the d'Entrecasteaux Islands) and Australia (Queensland along the east coast of the Cape York Peninsula). The type locality given is "Aroe-eilanden" (Aru Islands, Indonesia).[1]

This species is sympatric with M. spilota and the two often compete in the same ecological niche.

Habitat

Its main habitat is in rainforests, bushes, shrubs and trees.

Conservation
The largest threat to the species is habitat destruction due to logging of forests.

Behavior

Primarily arboreal, these snakes have a particular way of resting in the branches of trees; they loop a coil or two over the branches in a saddle position and place their head in the middle. This trait is shared with the emerald tree boa, Corallus caninus, of South America. This habit, along with their appearance, has caused people to confuse the two species when seen outside their natural habitat.

Reproduction

Oviparous, with 1-25 viable eggs per clutch. In the wild eggs are incubated and protected by the female, often in the hollow of a tree. Hatchlings are lemon yellow with broken stripes and spots of purple and brown, or golden or orange/red. Over time the color changes as the animal matures, color of the adult depends on the locality of the animal (some taking many years to finish color change).




Tuesday, 27 September 2011

RAINFOREST SNAKES...

As rainforests are so rich in biodiversity with the presence of favourable conditions such as warmth and water, it is no surprise that snakes in general are found in their greatest numbers in the tropical areas of the Earth. (1)


GREEN SNAKE


We’ve even encountered a mention of the fact that “…most large amphibians and reptiles are today exclusively tropical in distribution”. (2)

As a significant part of the wildlife of tropical forests around the world, snakes have an impact on other animals both as predators and prey. (3)

Out of around 2,700 species of snakes in the world, only 1/5 th are venomous; the rest are not. (4)

Without trying to put an exact figure on it, we would assume that rainforests house a similar proportion of venomous and non-venomous snakes.

Learn more about some fascinating Snake Facts here.

Snakes use most types of habitats in a rainforest – most of them live on and under the ground but some of them also inhabit trees and water sources. (5)

Rainforest snakes are carnivores. They employ several ways of attacking other animals. Non-venomous snakes can either pin their prey to the ground or “constrict” them which means that they wrap their own bodies around them in a coil and squeeze them until the victim dies. Venomous snakes normally inject venom into their prey. (6)

Boas (such as anacondas, boa constrictors and pythons) are probably some of the most popular rainforest snakes.


Amazon Snakes

The Amazon forest – the largest tropical rainforest of the world – is home to a great variety of snakes.

As some authors mention: “… snakes appear to be the single most diverse reptile group in the Amazon Basin, where more than 175 snake species have been described”.
The floodplains house a large number of all the reptile species found in the Amazon Basin, and though many species of snakes inhabiting the Amazonian floodplains are aquatic the majority of them are most likely arboreal. Many Amazonian snakes, such as boas, pit vipers and some colubrids, move to live in the forest’s trees during floods.