Hippopotamuses, found in sub-Saharan Africa, are known for their aggressive territorial nature and are responsible for approximately 500 deaths annually in Africa. These herbivores are known to charge at boats and can weigh around 4,000kg.
Also in sub-Saharan Africa, Cape buffalo, which can number up to 900,000, are reportedly responsible for killing more hunters on the continent than any other creature. These animals, which can grow to nearly 6ft tall and weigh close to 2,000lb, can charge at speeds of up to 35 miles per hour and are known to attack moving vehicles.
Other dangerous animals include the Inland Taipan Snake, found in Australia's semi-arid regions, which possesses venom estimated to be capable of killing over 100 adult humans with a single bite. The golden poison dart frog, inhabiting rainforests along Colombia's Pacific coast, carries enough poison in one frog to kill 10 grown men, with just two micrograms sufficient to kill an individual.
Marine dangers include the bull shark, which lurks in both saltwater and freshwater habitats, and the box jellyfish, found in Indo-Pacific waters, considered by the National Oceanic and Atmospheric Administration to be the most venomous marine animal globally. Cone snails, found in tropical waters, have a complex venom with no known antivenom, capable of causing paralysis within moments.