10 most difficult nature riddles A list of ten (out of 257) nature related questions that are the most often answered incorrectly Nature quiz How much of Australia coastline is desertous? (out of total 21,262 miles/34,218 km)140 miles (180 km). More than 40% of Australia's land is classified as desert, but almost all of it is located inland. The Great Sandy Desert is the only one to extend to the coast, forming the long sweep of the Eighty Miles Beach (which is actually 140 miles long).very hard 22% 140 miles (180 km)140 miles (180 km)22%1,000 miles (1,600 km)1,000 miles (1,600 km)13%3,000 miles (4,800 km)3,000 miles (4,800 km)23%14,000 miles (22,500 km)14,000 miles (22,500 km)40%Created by: Cleo. Statistics based on 3884 answers in 2 languages »geography of Australia riddles » Which animals are the most threatened by a prion disease?Sheep. Scrapie is infectious and incurable. Recent studies suggest prions may be spread through urine and persist in the environment for decades. Scrapie occurs in Europe and North America, but to date, Australia and New Zealand (both major sheep-producing countries) are scrapie-free.very hard 23% cattlecattle33%catscats38%sheepsheep23%ducksducks5%Created by: ex-terminator. Statistics based on 4693 answers in 2 languages »diseases riddles » Which animal doesn't belong to odd-toed ungulates?Rhinoceros. Odd-toed ungulates include the horse, the tapir, and the rhinoceros.very hard 24% hippopotamushippopotamus27%rhinocerosrhinoceros24%camelcamel15%okapiokapi32%Created by: Paweł Kołodziejczyk. Statistics based on 2154 answers in 2 languages »biology riddles » Aside from cattle, which animal provides most milk used by humans?Buffalo. Water buffaloes provide 11% of the world's milk, which is much more than goats (2%, third place). Buffalo's milk contains higher levels of total solids, crude protein, fat than cow milk; it gives therefore more cheese, butter and other dairy products. The top buffalo milk producers are India and Pakistan. very hard 25% goatgoat45%buffalobuffalo25%sheepsheep20%camelcamel7%Created by: globalquiz.org. Statistics based on 5747 answers in 2 languages »milk riddles » Where could you expect to find a wild Bactrian Camel?In Southern Siberia. The wild form of the Bactrian camel live in remote regions of the Gobi and Taklamakan Deserts, migrating from the desert to rivers in Siberia during winter.very hard 28% in Egyptin Egypt13%in Saudi Arabiain Saudi Arabia26%in Southern Siberiain Southern Siberia28%in Afghanistanin Afghanistan30%Created by: globalquiz.org. Statistics based on 3552 answers in 4 languages »zoogeography riddles » For what main reason do chameleons change color? As a social signal to othe chameleons. Color change in chameleons has various functions, depending on the species, but the most common is social signaling. Only few species, such as Smith's dwarf chameleon, also adjust their colors for camouflage. very hard 28% to match their surroundingsto match their surroundings62%as a social signal to othe chameleonsas a social signal to othe chameleons28%their skin change color when pressedtheir skin change color when pressed2%chameleons do not change colorchameleons do not change color6%Created by: globalquiz.org. Statistics based on 3782 answers in 4 languages »reptiles riddles » Where do pangolins live?Africa and Asia. Pangolins are found in India, China, Indonesia and Africa south of Sahara.very hard 28% Central AmericaCentral America17%AustraliaAustralia34%Africa and AsiaAfrica and Asia28%MadagascarMadagascar20%Created by: Luca Biaggi. Statistics based on 2499 answers in 2 languages »mammals riddles » Which mammal has more than seven cervical vertebrae (neck bones)?Sloth. Almost all mammals have seven neck bones, including giraffes with long necks and whales with short necks. The few exceptions include manatees and two-toed sloths, which each have only six cervical vertebrae, and three-toed sloths with nine cervical vertebraevery hard 28% giraffegiraffe30%mangustamangusta8%slothsloth28%nonenone32%Created by: globalquiz.org. Statistics based on 2466 answers in 2 languages »sloths riddles » Gunung Mulu national park, a place with the most extensive cave system in the world, is located in which country?Malaysia. Gunung Mulu national park is located in the eastern province of Sarawak, Malaysia. It is located on Borneo, near the southern border of Brunei. Gunung Mulu National Park has the largest known natural chamber or room – Sarawak Chamber. It is 700 m (2,300 ft)) long, 396 m (1,299 ft) wide and at least 70 m (230 ft) highvery hard 28% MalaysiaMalaysia28%ThailandThailand23%CambodiaCambodia31%IndonesiaIndonesia17%Created by: Pranav Yalamanchili. Statistics based on 1628 answers in 4 languages »geology riddles » Where do the largest among all crocodilians (crocodiles, alligators, caimans, gharials) live?In Southeast Asia. The saltwater crocodile is the largest of all living reptiles, reaching up to 6.3 m and 1,360 kg. It may be found from Northern Australia to the eastern coast of India.very hard 29% in Southeast Asiain Southeast Asia29%in Floridain Florida17%in South Australiain South Australia24%in the Nilein the Nile28%Created by: Kasia. Statistics based on 4931 answers in 2 languages »carnivores riddles » Play nature quiz and see all the questions.