Ornate flying snake (Chrysopelea)

Chrysopelea, or more commonly known as the flying snake, is a genus that belongs to the family Colubridae. Flying snakes are mildly venomousthough they are considered harmless because their toxicity is not dangerous to humans. Their range is in Southeast Asia, southernmost China, India, and Sri Lanka.
It glides by using its ridge scales along its belly, pushing against rough bark surface of tree trunks, allowing it to move vertically up a tree.
Once it decides on a destination, it propels itself by thrusting its body up and away from the tree, sucking in its stomach, flaring out its ribs to turn its body in a "pseudo concave wing" all the while making a continual serpentine motion of lateral undulation, parallel to the ground to stabilise its direction in midair in order to land safely. Their ability to glide has been an object of interest for physicists and the United States Department of Defense in recent years, and studies continue to be made on what other, more subtle, factors contribute to their flight.
 According to recent research conducted by the University of Chicago, scientists discovered a correlation between size and gliding ability, in which smaller flying snakes were able to glide longer distances horizontally. Flying snakes are diurnal, which means they hunt during the day, preying upon lizards, frogs, birds and bats.

 There are three species of flying snake
1.Ornate flying snake-This is the largest species of flying snake, reaching up to four feet in length.
2.Paradise tree snake-This flying snake species reaches up to three feet in length and is popular in the European pet trade.
3.Twin-barred tree snake or banded flying snake-This is the smallest flying snake species, reaching up to two feet in length.

Snouted cobra

The snouted cobra is a relatively large species of cobra. Adult specimens average between 1.2 to 1.8 metres (3.9 to 5.9 ft) in length but they may reach lengths of 2.5 metres (8.2 ft). Colouration of dorsal scales may vary from yellowish to greyish brown, dark brown or blue-black. Ventral scale colouration is yellow with darker mottles. A banded phase occurs throughout the species' range and is blue-black with 7-11 yellow to yellow-brown cross bars, the lighter bands being half the width of the darker bands. The latter colour phase is more common in males. Ventrally, yellow mottled with black. A darker throat band is present and is usually more prominent in juveniles
Habitat and ecology
Snouted cobras inhabit arid and moist savanna, particularly in bushveld and lowveld areas. It is not found in forests. As a large cobra, it likes to have a permanent home base or lair in an abandoned termite mound where it will reside for years if left undisturbed. It is a nocturnal species, foraging for food from dusk onwards, often venturing into poultry runs. It enjoys basking in the sun during the day near its lair or retreat. Not a particularly aggressive species, but will assume a formidable posture if cornered. Very large adults are able to lift as much as half a metre of the body off the ground while spreading a wide, impressive hood. However, given the opportunity it will escape to the nearest hole or crevice. Like the Rinkhals it may sham death if threatened, but this is rare. It preys on toads, rodents, birds and their eggs, lizards and other snakes, especially puff adders (Bitis arietans). It often raids poultry runs and can become a nuisance. It is preyed upon by birds of prey and other snakes.
Venom
It is a highly venomous species with neurotoxic venom. A bite can affect breathing and if left untreated may cause respiratory failure and death. Initial symptoms include pain and local swelling that may result in blistering. Typically, victims are bitten on the lower leg, usually at night.
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Black Mamba

The Black Mamba snake also known as Dendroaspis polylepis is one of Africa’s most dangerous and feared snakes. The black mamba is the largest venomous snake in Africa and the second largest snake in the world, after the King Cobra. Adult black mambas have an average length of 2.5 meters or 8.2 feet and a maximum length of 4.5 meters or around 14 feet. The Back Mamba is also one of the fastest land snakes in the world. It has the capability to reach speeds in excess of 12 mph or 20km/hr. It mainly uses this speed the escape danger rather than capturing prey.
The Black Mamba gets its name not because the color of its body, but because it has a black inky color mouth. The black mamba has either a dark olive, olive green, grey brown or metal color skin depending on what area on the country the Black Mamba is found. As Black Mamba’s begin to age, their skin starts to become darker.
Black Mambas are elapid snakes, which mean they are venomous snakes found in tropical or subtropical regions around the word including the Indian and Pacific Ocean. Elapid snakes are characterized by having a set of hollow, fixed fangs through which they inject venom. Black Mambas venom contains powerful, fast-acting neurotoxins and cardiotoxins, including calciseptine. Calcoseptine contains 60 amino acids with four disulfide bonds and is one of the main culprits for the Black Mambas prey to stop pumping blood through its veins.

Each bite that the Black Mamba delivers has about 100-120 mg of venom on average and it can deliver up to 400 mg. If the venom reaches a vein, .25 mg/kg is enough to kill a full-size human in half of the cases. The initial symptom of the bite is local pain in the bite area, then the viction experiences a tingling sensation in the mouth and extremities, double vision, tunnel vision, severe confusion, fever, excessive perspiration, foaming of the mouth and nose, and a lack of muscle control.
If the victim does not receive medical attention, symptoms rapidly progress to severe abdominal pain, nausea and vomiting, shortness of breath), and paralysis. Eventually, the victim experiences convulsions, respiratory arrest, coma, and then death. Without antivenom, the mortality rate is nearly 100%, the highest among venomous snakes.