Updated August 5, 2020 | Infoplease Staff

Land mammal: African elephants weigh up to 14,000 pounds and can eat as much as 600 pounds of food a day!

Marine mammal: The blue whale is the world's biggest animal, even larger than any known dinosaur. An average-sized adult is 80 feet long and weighs about 120 tons. This giant is also the loudest animal on Earth. Its call, which is louder than a jet, can be heard for hundreds of miles.

Bird: The ostrich can grow to 9 feet tall and weigh as much as 350 pounds. Its eggs, the largest of all birds, weigh up to three pounds.

Fish: The whale shark, which is not a whale, reaches 46 feet in length and weighs up to 15 tons.

Reptile: The saltwater crocodile can grow to 23 feet long.

Insect: Giant walking sticks can grow to about 13 in length.

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