10 Pequenos animais mais mortais do Mundo

10 Small Deadliest Animals in the World
In the animal kingdom the size does not matter. These ten killers can fit in the palm of your hand.

1. Southern blue-ringed octopus (Hapalochlaena maculosa)
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They are recognized as some of the world's most venomous marine animals. As an adult, it can grow up to 20 centimetres (8 in) long (top of the mantle to the tip of the arms) and on average weighs 26 grams (0.9 oz). Despite their small size and relatively docile nature, they can prove a danger to humans. They can be recognized by their characteristic blue and black rings and yellowish skin. They are normally a docile species, but they are highly venomous possessing venom capable of killing humans. Their blue rings appear with greater intensity when they become aggravated or threatened. When the octopus is agitated, the brown patches darken dramatically, and iridescent blue rings or clumps of rings appear and pulsate within the maculae. Typically 50-60 blue rings cover the dorsal and lateral surfaces of the mantle. They hunt small crabs, hermit crabs, and shrimp, and may bite attackers, including humans, if provoked.

2. Dart Golden frog (Phyllobates terribilis)
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Terribilis Phyllobates is a species of frog in the family Dendrobatidae. In relation to weight and size, this is enshrined animal as being the most poisonous vertebrate on the planet with enough venom to kill several people. 
Over 100 toxins have been identified in this frog. 
The poison is highlighted in the homobatracotoxina, a deadly chemical compound whose only symptom is multiple organ failure.

3. Sea Wasp (Chironex fleckeri)
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Chironex fleckeri, commonly known as sea wasp, is a species of box jellyfish found in coastal waters from northern Australia and New Guinea north to the Philippines and Vietnam. It has been described as "the most lethal jellyfish in the world", with at least 63 known deaths in Australia from 1884 to 1996.
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Notorious for its sting, has tentacles up to 3 m (9.8 ft) long covered with millions of cnidocytes which, on contact, release microscopic darts delivering an extremely powerful venom. Being stung commonly results in excruciating pain, and if the sting area is significant, an untreated victim may die in as few as three minutes. The amount of venom in one animal is said to be enough to kill 60 adult humans (although most stings are mild).

4. Hooded Pitohui (Pitohui dichrous)
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This species and its two close relatives, the Variable Pitohui and the Brown Pitohui, were the first documented poisonous birds. A neurotoxin called homobatrachotoxin found in the birds' skin and feathers, causes numbness and tingling in those touching the bird.
The Hooded Pitohui may acquire its poison from part of its diet, the Choresine beetles of the Melyridae family. These beetles are also a likely source of the lethal batrachotoxins found in Colombia's poison dart frogs.

5. Giant Silkworm Moth (Lonomia obliqua)
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Lonomia obliqua is a species of Saturniid moths from South America. It is famous for its larval form, rather than the adult moth, primarily because of the caterpillar's defense mechanism, urticating bristles that inject a potentially deadly venom. The caterpillar has been responsible for several deaths, especially in southern Brazil. Its venom has also been the subject of numerous medical studies.
These caterpillars are about 4.5 to 5.5 centimetres (about 2 in) long, with background colors ranging from green to brown. Well camouflaged, they have rows of tubercles crowned with whorls of easily detachable spines of different sizes.

6. Brazilian wandering spider (Phoneutria)
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Brazilian wandering spiders, armed spiders ("armadeiras", as they are known in Brazilian Portuguese), or banana spiders (not to be confused with the relatively harmless Nephila), are a genus of aggressive and venomous spiders of potential medical significance to humans. They are mainly found in tropical South America, with one species in Central America.
The Brazilian wandering spiders appear in Guinness World Records from 2010 as the world's most venomous spider. Guinness World Records states that although the Brazilian wandering spider is the most toxic, an effective antivenom is available and few fatalities occur.
The spiders in the genus can grow to have a leg span of 13 to 15 cm (5.1 to 5.9 in). Their body length ranges from 17 to 48 mm (0.67 to 1.89 in).

7. (Tetraodontidae)
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Tetraodontidae is a family of primarily marine and estuarine fish of the order Tetraodontiformes. The family includes many familiar species, which are variously called pufferfish, puffers, balloonfish, blowfish, bubblefish, globefish, swellfish, toadfish, toadies, honey toads, sugar toads, and sea squab. They are morphologically similar to the closely related porcupinefish, which have large external spines (unlike the thinner, hidden spines of Tetraodontidae, which are only visible when the fish has puffed up). The scientific name refers to the four large teeth, fused into an upper and lower plate, which are used for crushing the shells of crustaceans and mollusks, their natural prey.
Pufferfish are generally believed to be the second-most poisonous vertebrates in the world, after the golden poison frog. Certain internal organs, such as liver, and sometimes the skin, contain tetrodotoxin and are highly toxic to most animals when eaten; nevertheless, the meat of some species is considered a delicacy in Japan (as 河豚, pronounced as fugu), Korea (as 복 bok or 복어 bokeo ), and China (as 河豚 hétún) when prepared by specifically trained chefs who know which part is safe to eat and in what quantity.
The Tetraodontidae contain at least 120 species of puffers in 19 genera. They are most diverse in the tropics, relatively uncommon in the temperate zone, and completely absent from cold waters. They are typically small to medium in size, although a few species can reach lengths of greater than 100 cm (39 in).

8. Deathstalker (Leiurus quinquestriatus)
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The deathstalker is a species of scorpion, a member of the Buthidae family. It is also known as Israeli yellow scorpion, Palestine Yellow Scorpion Omdurman scorpion, Israeli desert scorpion and numerous other colloquial names, which generally originate from the commercial captive trade of the animal. To eliminate confusion, especially with potentially dangerous species, the scientific name is normally used to refer to them. The name Leiurus quinquestriatus roughly translates into English as "five-striped smooth-tail". Other species of the genus Leiurus are often referred to as "deathstalkers" as well.
The deathstalker is yellow in color, and measures 30–77 millimetres (1.2–3.0 in) long, with an average of 58 mm (2.3 in).
The deathstalker is regarded as a highly dangerous species because its venom is a powerful mixture of neurotoxins, with a low lethal dose. While a sting from this scorpion is extraordinarily painful, it normally would not kill an otherwise healthy adult human. However, young children, the elderly, or infirm (such as those with a heart condition or those who are allergic) would be at much greater risk.

9. Geography cone (Gastridium geographus)
Predatory marble cone snail stings can cause respiratory muscle paralysis leading to death.
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Geography cone, is a species of predatory sea snail, a marine gastropod mollusk in the family Conidae, the cone snails, cone shells or cones. Although all cone snails hunt and kill prey using venom, the venom of this species is known to be especially potent
Gastridium geographus is highly dangerous - live specimens should be handled with extreme caution. Gastridium geographus has the most toxic sting known among Conus species and is responsible for more than thirty human fatalities. Their venom, a complex of hundreds of different toxins, is delivered through a harpoon-like tooth propelled from an extendable proboscis. There is no antivenom for a cone snail sting, and treatment is limited to merely keeping victims alive until the toxins wear off.
Among the compounds found in cone snail venom are proteins which, when isolated, have great potential as pain-killing drugs. Research shows that certain of these proteins target specific human pain receptors and can be up to 10,000 times more potent than morphine without morphine's addictive properties and side-effects.

10. Bullet Ant (Paraponera clavata)
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Paraponera clavata is a species of ant, commonly known as the lesser giant hunting ant, conga ant, or bullet ant, named on account of its powerful and potent sting. It inhabits humid lowland rainforests from Nicaragua and the extreme east of Honduras south to Paraguay. The bullet ant is called hormiga veinticuatro or "24 (hour) ant" by the locals, referring to the 24 hours of pain that follow being stung. The species epithet clavata means "club-shaped".
Workers are 18–30 mm (0.7 to 1.2 in) long and resemble stout, reddish-black, wingless wasps. Paraponera is predatory, and like all primitive poneromorphs, does not display polymorphism in the worker caste; the queen is not much larger than the workers.

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Note: The Satere-Mawe people of Brazil use intentional bullet ant stings as part of their initiation rites to become a warrior. The ants are first rendered unconscious by submerging them in a natural sedative, and then hundreds of them are woven into a glove made of leaves (which resembles a large oven mitt), stingers facing inward. When the ants regain consciousness, a boy slips the glove onto his hand. The goal of this initiation rite is to keep the glove on for a full 10 minutes. When finished, the boy's hand and part of his arm are temporarily paralyzed because of the ant venom, and he may shake uncontrollably for days. The only "protection" provided is a coating of charcoal on the hands, supposedly to confuse the ants and inhibit their stinging. To fully complete the initiation, however, the boys must go through the ordeal a total of 20 times over the course of several months or even years.

Source: www.wikipedia.org

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