Animals that are extinct due to human factors (10 points for good ones)!!

The dodo bird native to the African island country of Mauritius

In the late 16th century, Europeans with rifles and hounds came to Mauritius. After the Europeans came to the island, the dodo bird It became their main source of food. From then on, a large number of dodos were killed with guns and dogs, birds and eggs. Even the young birds and eggs were not spared. At the beginning, Europeans could kill 100,000 dodos every day. There were thousands to tens of thousands of dodos, but due to excessive hunting, the number they killed every day soon became less and less, and sometimes they could only kill a few every day.

In 1681, finally A dodo was brutally murdered, and from then on, the dodo was never seen again on earth, except in museum herbariums and in artist's drawings.

Yangtze river dolphin is also known as Baiji dolphin, commonly known as white-fin, white clip, and river horse. Its English name is: Yangtze river dolphin. It is a mammal belonging to the order Cetacea, the family Beakidae, and the genus Baiji. It is a Chinese The unique freshwater dolphin is also one of the smallest freshwater dolphins in the world. Because it is rare and endemic to China, it is called the "giant panda in the water". It is a national first-level protected animal. It is currently only distributed in the 1,600-kilometer stretch from Zhicheng, Hubei to the Yangtze Estuary in the middle and lower reaches of the Yangtze River. It has lived in the waters of the Yangtze River for 25 million years and is known internationally as the "flagship". kind". They feed on fish and move in groups, with 2 to 3 individuals in small groups and 10 to 16 individuals in large groups. The population has declined rapidly in recent years. According to reports, there were more than 400 head in the early 1980s, which dropped to about 300 in the mid-1980s. There were about 200 head during the survey in 1990. By 1993, there were more than 130 head. By 1995, there were less than 100 head. In 1997, *** observed 13 Baiji dolphins; in 1998 and 1999, there were 4 and 4 respectively.

Authorities from six countries have joined forces to search

For 7 years, no one has seen its shadow in the Yangtze River. Therefore, this expedition was considered the last chance to protect it.

In early November 2006, an expedition team composed of scientists from six countries including China, the United States, and Japan set out from Wuhan. They took two large research ships and traveled 3,400 kilometers back and forth in the middle and lower reaches of the Yangtze River for 39 days to determine the status of this species.

The river wind is bleak, and people's hearts are filled with hope. The participants are all top international cetacean researchers, such as the bearded American Dr. Robert Pittman, who has seen more than 70 species of cetaceans in the wild; the British zoologist Shamir, who has superhuman powers. Field observation ability; Akamatsu Tomoshige, a famous Japanese animal acoustics expert, also brought two sets of "hydrophones" to ensure that no sound of Baiji dolphins is missed within a radius of 300 meters.

Since then, wild Baiji dolphins have disappeared from people’s sight.