TOP 10/dangerous animals ,which are very dangerous some time.
Black mamba snakes are also known as the Black-mouthed mamba, Southern brown mamba or Swart mamba and they are some of the most venomous snakes in the world. The Black Mamba snake is the largest venomous snake in Africa and the second largest venomous snake in the world.The Black Mamba snake is found in Eastern Africa, from southern Ethiopia to southwest Africa.Adult Black mamba snakes have an average length of 2.5 metres (8.2 feet) and a maximum length of 4.5 metres (14 feet). The Black mamba snake receives its name from the black colouration inside of its mouth, rather than their skin colour which is a grey to olive tone. The Black mamba snake is the fastest moving snake in the world, capable of moving up to 20 kilometres per hour (12.5 miles per hour). However it uses this speed to escape danger.
from the eastern coast of India, the saltwater crocodile is extremely rare on the Indian subcontinent (de Vos, 1984). The saltwater crocodile is also found in Bangladesh. A large population is present within the Bhitarkanika Wildlife Sanctuary of Odisha while smaller populations occur throughout the Sundarbans. Populations are also present within the mangrove forests and other coastal areas of the Andaman and Nicobar Islands in India. Saltwater crocodiles were once present throughout most of the island of Sri Lanka.
Characteristics, Habitat and Behaviour:
The saltwater crocodile is the largest of all crocodilians, and the largest reptile in the world. The species has a relatively large head, with a pair of ridges that run from the eye along the centre of the snout. Adults are generally dark in colour, with lighter tan or grey areas, and dark bands and stripes on the lower flanks. The underside is creamy yellow to white, becoming greyer along the tail. The juvenile is usually pale tan, with black stripes and spots on the body and tail, which gradually fade with age, although never disappear entirely. Female saltwater crocodiles are smaller in size than their male counterparts, normally reaching a maximum length of 2.5 to 3 m. With its long, powerful tail, webbed hind feet, and long, powerful jaws, the saltwater crocodile is a superbly adapted aquatic predator. As in all crocodilians, the eyes, ears and nostrils are located on top of the head, allowing the crocodile to remain almost totally submerged when lying in water, helping to conceal it from potential prey, while a special valve at the back of the throat allows the mouth to be opened underwater without water entering the throat. The saltwater crocodile is considered to be more aquatic than most crocodilians, and is less heavily armored along the back and neck. Saltwater crocodiles have a variety of prey. Juveniles are restricted to small insects, amphibians, reptiles, crustaceans, and small fish. Adults feed on crabs, turtles, snakes, birds, buffalo, wild boar, and monkeys. Saltwater crocodiles hide in the water exposing only their eyes and nose. They lunge at prey, often killing it with a single snap of the jaws, then drag the prey under water where it is more easily consumed.
The pufferfish is a family of fish, with about 100 species They are also known as the blowfish, fugu, swellfish, and globefish. They are called the pufferfish because when they are threatened, they puff up to about twice their normal size by gulping water. In this enlarged state, the pufferfish can swim at only about half their normal speed. Pufferfish are generally believed to be the second-most poisonous vertebrates in the world, after the golden poison frog. They use tetrodotoxin, a powerful neurotoxin.
Most pufferfish are found in sub-tropical and tropical marine waters (including coral reefs) in the Atlantic, Pacific, and Indian Oceans. Some puffers live in brackish and fresh water.
Mosquitoes are insects that are found almost everywhere in the world. Female mosquitoes bite animals and people, leaving itchy bumps. Mosquitoes can spread malaria, yellow fever, and other serious diseases through their bites. Mosquitoes are part of a large group of insects called flies.
A mosquito has a soft body with a hard covering called an exoskeleton. It has two narrow wings, two antennas, and six long legs. A female mosquito usually has a mouthpart called a proboscis, which looks like a long tube. She uses her proboscis to pierce skin and suck blood from animals. She needs the blood for her eggs to develop. Male mosquitoes do not bite. Their mouthparts are designed for feeding on plant juices.
Female mosquitoes lay their eggs on the surface of standing water. The eggs hatch into long, wriggling larvae. The larvae live at the surface of the water. They molt (shed their outside covering) a few times and then change into a new form, called pupae. Pupae also live in the water. They develop into adults that can fly away and reproduce.
Mosquitoes are considered pests because they carry so many diseases. But getting rid of mosquitoes is difficult. One way is to drain the water out of ditches, swamps, and ponds where they lay their eggs. To destroy full-grown mosquitoes, insecticides are sometimes used. Insecticides are powders or liquids for killing harmful insects. But they can be dangerous for animals and people, too.
Cone snails, cone shells, or cones are a large group of small- to large-sized extremely venomous predatory sea snails, marine gastropod molluscs.[1]
Until fairly recently, over 600 species of cone snails were all classified under one genus, Conus, in one family, the Conidae. However, in recent years, it was suggested that cone snails should occupy only a subfamily that should be split into a very large number of genera. A 2014 paper attempted to stabilize a newer classification of the group, significantly reducing the number of new genera but keeping a fairly large number of subgenera. Although the taxonomy has changed significantly several times during recent years, in the current (2015) version of the taxonomy of these snails and their close relatives, cone snails once again compose the entire family Conidae.
Geologically speaking, fossils of cone snails are known from the Eocene to the Holocene epochs.[2] Cone snail species have shells that are shaped more or less like geometric cones. Many species have colorful patterning on the shell surface.[3] Cone snails are almost all tropical in distribution.
Because all cone snails are venomous and capable of "stinging" humans, live ones should never be handled, as their venomous sting will occur without warning and can be fatal. The species most dangerous to humans are the larger cones, which prey on small bottom-dwelling fish; the smaller species mostly hunt and eat marine worms. Cone snails use a hypodermic needle–like modified radula tooth and a venom gland to attack and paralyze their prey before engulfing it. The tooth, which is sometimes likened to a dart or a harpoon, is barbed and can be extended some distance out from the head of the snail, at the end of the proboscis.
VenomTheir venom is considered to be among the most deadly in the world, containing toxins that attack the heart, nervous system, and skin cells. It is so overpoweringly painful, human victims have been known to go into shock and drown or die of heart failure before even reaching shore. Survivors can experience considerable pain for weeks and often have significant scarring where the tentacles made contact.
Range and AppearanceBox jellies, also called sea wasps and marine stingers, live primarily in coastal waters off Northern Australia and throughout the Indo-Pacific. They are pale blue and transparent in color and get their name from the cube-like shape of their bell.
TentaclesUp to 15 tentacles grow from each corner of the bell and can reach 10 feet in length. Each tentacle has about 5,000 stinging cells, which are triggered not by touch but by the presence of a chemical on the outer layer of its prey.
Highly-Advanced AdaptationsBox jellies are highly advanced among jellyfish. They have developed the ability to move rather than just drift, jetting at up to four knots through the water. They also have eyes grouped in clusters of six on the four sides of their bell. Each cluster includes a pair of eyes with a sophisticated lens, retina, iris and cornea, although without a central nervous system, scientists aren’t sure how they process what they see.
world’s most dangerous fly, the tsetse – a small speck of an insect that measures up to 0.7 inches, or about the same size as the average house fly – is commonly found in sub-Saharan countries, especially those in the center of the continent including the Sudans, the Democratic Republic of the Congo and Angola. While the flies themselves are nasty bloodsucking bugs that usually feed during the peak warm hours, their true terror lies in the protozoan parasites they spread known as trypanosomes. These microscopic pathogens are the causative agent of African sleeping sickness, a disease marked by neurological and meningoencephalitic symptoms including behavioural changes and poor coordination, as well as the disturbances to the sleep cycle that give the illness its name. If left untreated, it can lead to death. While there are no vaccines or medications available to prevent infection, methods of protection include opting for neutral-coloured clothing (the tsetse is attracted to bright and dark shades, especially blue), avoiding bushes during the day and wearing permethrin-treated gear in more remote areas.
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