10 most difficult animal records riddles

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.

Greater was the world's oldest greater flamingo, residing at the Adelaide Zoo in Adelaide, Australia. It was at least 83 years old, having arrived at the zoo from either Cairo or Hamburg in either 1933, 1930, 1925, or 1919, at which point it was already a full-grown adult. On October 29, 2008, Greater was attacked and beaten by four teenagers. In late January 2014, Greater's health deteriorated even further, and the decision was made to euthanize Greater.

A cat named Dusty, born in 1935, in Bonham, Texas, USA gave birth to 420 kittens during her life. On June 12, 1952, she gave birth to the last litter (one female).

Plutomurus ortobalaganensis is the deepest terrestrial animal ever found on Earth, living at 1,980 metres (6,500 ft) below a cave entrance. It is a species of springtail (arthropods) endemic to the Krubera-Voronja cave system in Georgia. It was discovered in the CAVEX Team expedition of 2010.

The area of nasal mucous membrane in a bear's head is 7 times greater than a bloodhound's (and one hundred times larger than in a human's). Polar bears have been seen to march up to 40 miles in a straight line to reach a prey animal they have detected.

The largest nemertean and possibly the longest animal is the bootlace worm, Lineus longissimus. A specimen found washed ashore on a beach in St. Andrews, Scotland in 1864 was recorded at a length of 55 m (180 ft). This thing makes the blue whale seem short by comparison. Its mucus is highly toxic.

The arapaima, pirarucu, or paiche are any large species of bonytongue in the genus Arapaima native to the Amazon and Essequibo basins of South America. Genus Arapaima is the type genus of the family Arapaimidae. They are among the world's largest freshwater fish, reaching as much as 3 m (9.8 ft).

The Ankole-Watusi is a modern American breed of domestic cattle. It derives from the Ankole group of Sanga cattle breeds of central Africa. It is characterized by very large horns.

Gaboon viper is found in the rainforests and savannas of sub-Saharan Africa. Like all vipers, it is venomous. It has the longest fangs (up to 5 cm) and the highest venom yield of any snake. The body is boldly patterned with rectangles and triangles of buff, purple, and brown, which gives the snake its velvetlike appearance and provides excellent camouflage.

Giant squids have the largest eyes of any living creature except perhaps colossal squid – over 30 centimeters (1 ft) in diameter. Large eyes can better detect light (including bioluminescent light), which is scarce in deep water.