10 most difficult nature riddles A list of ten (out of 259) nature related questions that are the most often answered incorrectly Nature quiz 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 21% cattlecattle33%catscats39%sheepsheep21%ducksducks5%Created by: ex-terminator. Statistics based on 5712 answers in 2 languages »diseases riddles » 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 21% 140 miles (180 km)140 miles (180 km)21%1,000 miles (1,600 km)1,000 miles (1,600 km)14%3,000 miles (4,800 km)3,000 miles (4,800 km)24%14,000 miles (22,500 km)14,000 miles (22,500 km)39%Created by: Cleo. Statistics based on 4645 answers in 2 languages »geography of Australia 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 24% goatgoat46%buffalobuffalo24%sheepsheep20%camelcamel7%Created by: globalquiz.org. Statistics based on 6780 answers in 2 languages »milk 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 24% to match their surroundingsto match their surroundings56%as a social signal to othe chameleonsas a social signal to othe chameleons24%their skin change color when pressedtheir skin change color when pressed4%chameleons do not change colorchameleons do not change color14%Created by: globalquiz.org. Statistics based on 6072 answers in 4 languages »reptiles 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% hippopotamushippopotamus26%rhinocerosrhinoceros24%camelcamel15%okapiokapi34%Created by: Paweł Kołodziejczyk. Statistics based on 4240 answers in 2 languages »biology riddles » What is the main feeding behaviour of hyenas?Hunting. Hyenas have long been regarded as being cowardly scavengers. Today they are known for killing as much as 95% of the animals they eat, and for driving off leopards or lionesses from their kills.very hard 26% scavengingscavenging70%huntinghunting26%cannibalismcannibalism1%none of the abovenone of the above1%Created by: ex-terminator. Statistics based on 4365 answers in 4 languages »animals of Africa riddles » Who was the first to create a zoo and botanical garden for scientific study?Aristotle. Throughout his conquests of Asia, Alexander the Great collected many plant and animal specimens for Aristotle’s research. This allowed Aristotle to develop in Athens the first zoo and botanical garden in existence.very hard 27% AristotleAristotle27%GalileoGalileo11%Carl LinnaeusCarl Linnaeus31%Charles DarwinCharles Darwin29%Created by: globalquiz.org. Statistics based on 4217 answers in 4 languages »science 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 27% in Egyptin Egypt14%in Saudi Arabiain Saudi Arabia27%in Southern Siberiain Southern Siberia27%in Afghanistanin Afghanistan30%Created by: globalquiz.org. Statistics based on 4652 answers in 4 languages »zoogeography 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 27% giraffegiraffe31%mangustamangusta8%slothsloth27%nonenone32%Created by: globalquiz.org. Statistics based on 3258 answers in 2 languages »sloths 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 28% in Southeast Asiain Southeast Asia28%in Floridain Florida17%in South Australiain South Australia23%in the Nilein the Nile30%Created by: Kasia. Statistics based on 6758 answers in 2 languages »carnivores riddles » Play nature quiz and see all the questions.