Write a 200-word composition on extinction.

1. spotted donkey (extinct after 1883).

Also known as half-length zebra, half-length horse, subspecies of common zebra. One of the most famous extinct animals in Africa. 1788, the spotted donkey was originally listed as an independent species, and it was called the spotted donkey. The spotted donkey became extinct because its meat and skin were brutally hunted by human beings, and the live specimen of the spotted donkey that was finally kept in captivity died in Artis Magistra Zoo in Amsterdam, the Netherlands, on August 1883.

Spotted donkey is actually a subspecies of grassland zebra. The back half of its body is black, while its abdomen and limbs are white. Spotted donkey's eyes are behind the skull. The spotted donkey has a long neck and a long head, but its ears are short. The spotted donkey disappeared from the earth forever in 1883 due to human's wanton killing.

2. Strada manatee (extinct since 1768). Uninformed livestock can grow to 25.9 feet long (equivalent to 7.9 meters), and adult Stella manatees generally weigh 3 tons. A large number of Stella manatees once lived in the North Pacific coast, southern Japan and California. It is likely that the arrival of human beings not only led to the extinction of Nestera manatees in this area, but also led to the extinction of Nestera manatees in other areas.

Strada manatee, also known as Starr manatee, has no teeth and lives mainly in Comando Islands. Strada manatee is huge, with a body length of 7-8 meters and a weight of 3-4 tons. It is the second largest mammal in the ocean.

3. The marsupial wolf (extinct in 1936). A famous carnivore with a bag attached to it in modern times, which is produced in Australia and New Guinea, is usually called Tas Megna Tiger. The origin of this species can be traced back to the Miocene of Early Tertiary. Although this species is considered extinct, there are still many reports of marsupials being witnessed.

The marsupial wolf, English name Thylacine Tasmanian wolf, was once widely distributed in the Australian mainland and nearby islands (extinct in 1936). After European immigrants settled in Australia, the marsupial wolf on the Australian mainland became extinct, and it was only distributed in Tasmania in southern Australia. Some people think that wild populations are extinct. Body like a dog, head like a wolf. Shoulder height is 600 mm, body length is 750 mm, tail length is 530 mm, coat color is light gray or yellowish brown, and there are 14- 18 black band spots on the back. Hair is short, dense and very hard. The mouth is very long. Five toes on the front foot and four toes on the back foot.