10 most difficult nature riddles A list of ten (out of 263) 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 6004 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)13%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)40%Created by: Cleo. Statistics based on 4901 answers in 2 languages »geography of Australia 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 21% to match their surroundingsto match their surroundings52%as a social signal to othe chameleonsas a social signal to othe chameleons21%their skin change color when pressedtheir skin change color when pressed5%chameleons do not change colorchameleons do not change color20%Created by: globalquiz.org. Statistics based on 7449 answers in 4 languages »reptiles 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%camelcamel8%Created by: globalquiz.org. Statistics based on 7110 answers in 2 languages »milk riddles » Which of the sea currents is the strongest?Antarctic Circumpolar Current. This cold sea current circulates the globe in the far south. It creates a zone of very strong winds and storms, by which sailing Cape Horn is such a challenge for sailors. Depth of current exceeds 3000 m.very hard 24% Antarctic Circumpolar CurrentAntarctic Circumpolar Current24%Equatorial Counter CurrentEquatorial Counter Current12%Gulf StreamGulf Stream42%North Atlantic CurrentNorth Atlantic Current20%Created by: Katarzyna Dąbrowska. Statistics based on 4665 answers in 2 languages »sailing riddles » Which animal doesn't belong to odd-toed ungulates?Rhinoceros. Odd-toed ungulates include the horse, the tapir, and the rhinoceros.very hard 25% hippopotamushippopotamus26%rhinocerosrhinoceros25%camelcamel15%okapiokapi33%Created by: Paweł Kołodziejczyk. Statistics based on 4969 answers in 2 languages »biology 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 26% AristotleAristotle26%GalileoGalileo11%Carl LinnaeusCarl Linnaeus32%Charles DarwinCharles Darwin29%Created by: globalquiz.org. Statistics based on 4585 answers in 4 languages »science 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 4752 answers in 4 languages »animals of Africa 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 26% giraffegiraffe31%mangustamangusta9%slothsloth26%nonenone32%Created by: globalquiz.org. Statistics based on 3514 answers in 2 languages »sloths 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 Egypt13%in Saudi Arabiain Saudi Arabia27%in Southern Siberiain Southern Siberia27%in Afghanistanin Afghanistan30%Created by: globalquiz.org. Statistics based on 5049 answers in 4 languages »zoogeography riddles » Play nature quiz and see all the questions.