10. Poison Dart Frog
Poison dart frog is the common name of the Dendrobatidae family of small, dihydrogen poison dart frogs are native to central and South America. The frogs are widely called poison arrow frogs or poison dart frogs due to indigenous peoples' use of their toxic excretions to poison the tips of arrows and blowdarts9. Cape Buffalo
Cape Buffalo - The Cape or African buffalo is the largest African antelope and can weigh up to 2000 lbs. It has few natural predators other than man. Lions will attack only old, sick or immature buffaloes and leopards will attack only newborn calves.8. Polar bear
The Polar bear (Ursus maritimus) is a bear native to the Arctic and Subarctic. The world's largest land carnivore, an adult male generally weighs 300–600 kg (660–1320 lb), while an adult female is about half that size.7. Elephant
Elephants are mammals, and the largest land animals alive today. The elephant's gestation period is 22 months, the longest of any land animal. At birth it is common for an elephant calf to weigh 120 kilograms (265 lb). An elephant may live as long as 70 years, sometimes longer6. Australian Saltwater Crocodile
The Australian Saltwater Crocodile (Crocodylus porosus) is the largest of all living crocodiles and reptils. It is found in suitable habitat throughout Southest Asia and northern Australia.5. African Lion
The African Lion (Panthera leo) is a member of the family Falidae and one of four big cats in the genus panthera. With exceptionally large males exceeding 250 kg (550 lb) in weight, it is the second-largest living cat after the tiger. 4. Great White Shark
The Great White Shark, Carcharodon carcharias, also known as white pointer, white shark, or white death, is an exceptionally large lamniform shark found in coastal surface waters in all major oceans. Reaching lengths of more than 6 m (20 ft) and weighing up to 2,250 kg (5,000 lb), the great white shark is the world's largest known predatory fish. 3. Australian Box Jellyfish
Australian Box Jellyfish are best known for the extremely powerful venom possessed by some of their species. The Australian Box Jellyfish species are amongst the most venomous creatures in the world. Stings from such species are excrutiatingly painful, either initially or as an after-effect, and are often fatal. However not all species of Box Jellyfish are this dangerous to humans. 2. Asian Cobra
Asian Cobra (Naja naja) is a species of venomus snake native to the Indian subcontinent. It is the most famous of the Big Four, the four most venomous snakes of India for which a single polyvalent antevenin has been created. 1. Mosquito
Mosquito have a pair of scaled wings, a pair of halteres, a slender body, and long legs. The females of most mosquito species suck blood from other animals, which has made them the most deadly disease vectors known to man, killing millions of people over thousands of years and continuing to kill millions per year by the spread of diseases.