What are some of the reasons why birds were able to avoid mass extinctions?

Personally, I think that birds themselves have the ability to fly, and most disasters can be avoided, so they can avoid mass extinctions.

Birds have wings, can fly, and are agile, and when danger comes, they can fly up in an instant to avoid danger and avoid extinction.

The reason is probably that they are oviparous, and they are also able to fly, and they are able to escape some disasters.

1. The Chinese merganser duck is a species that survived after the glacial period of the Tertiary Period, which has been around for more than 10 million years, and is a rare bird endemic to China and a national first-class key protected animal. The Chinese merganser duck is an internationally endangered animal that is rarer than the Chinese alligator.

2. Yellow-bellied horned pheasant, small number of nest eggs, low hatching rate, serious harm from natural enemies (green ferret, jay, ocelot), coupled with human interference such as deforestation, habitat loss and poaching, the distribution area of yellow-bellied horned pheasant is shrinking more and more, and the population is also declining.

3. The threats to the survival of the black-necked crane mainly include the development and utilization of lakes in the plateau area, the establishment of fishing grounds, the construction of roads, large-scale drainage, the transformation of swamps, and the expansion of nomadic areas. The environment in which the black-necked crane lives also has a large number of pesticides to kill rodents and insects, illegal hunting and egg collection.

4. The black-faced spoonbill, a globally endangered and rare bird, has become the second most endangered waterfowl after the crested ibis, and the International Union for the Conservation of Natural Species and the International Committee for the Conservation of Birds have included it in the Red Book of Endangered Species. It is now a second-class protected animal in China.

5. White stork, due to illegal hunting, pesticide and chemical poison pollution, etc., the population of the Oriental white stork in Japan is gradually decreasing, and only a small number of wintering individuals can be found occasionally in winter. Due to the dense population and the development of industry and agriculture, the remaining breeding grounds in the Russian Far East and the provinces of Heilongjiang and Jilin in northeastern China have become extremely small, and in 2009 there were less than 3,000 Oriental white storks in the wild in the world.

All living things are exposed to environmental pollution.

China: Birds:

Curly-feathered pelican red-footed.

Boobies, brown boobies, small reeds (open birds), white storks, black storks.

Crested ibis, white ibis, white spoonbill, black-faced spoonbill, red-breasted black goose, whooper swan, whooper swan, mute swan, mandarin duck, golden eagle, tiger head sea eagle, vulture, alpine vulture, goshawk, pine sparrowhawk, bee, eagle, chestnut kite, steppe eagle, black eagle, small eagle, snake eagle, peregrine falcon, tern falcon, kestrel.

Black Grouse, Rock Ptarmigan Flower-tailed Hazel Pheasant, Blood Pheasant, Grey-bellied Horned Pheasant, Yellow-bellied Horned Pheasant, Red-bellied Horned Pheasant, Green-tailed Rainbow Pheasant, Brown-tailed Rainbow Pheasant, Tibetan Horse Pheasant, Blue Pheasant, Brown Pheasant, Black Pheasant, White Pheasant, Blue Pheasant, Raw Pheasant, Spoon Pheasant, Black-necked Long-tailed Pheasant.

White-crowned long-tailed pheasant, white-necked long-tailed pheasant, black long-tailed pheasant, white-bellied golden pheasant, red-bellied golden pheasant, peacock pheasant, green peacock, gray crane, black-necked crane, white-headed crane, red-crowned crane, white-naped crane, white crane, red-necked crane, demoiselle crane, great bustard, relict gull, green emperor dove.

Scarlet-breasted parrot Flower-headed parrot Grey-headed parrot Grass Owl Red-horned Owl Collared Horned Owl Eagle Owl Snow Owl Eagle Owl Brown Wood Owl Long-tailed Wood Owl Long-eared Wood Owl Long-eared Kingfisher Brown-necked Hornbill Crested Hornbill Two-hornbill Long-tailed Broadbill Blue-winged eight-colored thrush.

Endangered birds in China include the black stork, white stork, crested ibis, yellow-bellied horned pheasant, black-necked crane, white crane, red-crowned crane, red-necked crane, whooper swan, whooper swan, Chinese merganser, etc.

The world's endangered birds, such as the black-faced spoonbill, the kāgū, the Indian vulture, the Australian big bird, the North American migratory pigeon, the rare bird species endemic to Africa, the gray crowned crane, and 10 species of Antarctic penguins are endangered.

Of the world's 9,775 bird species, 1,212 are threatened with extinction. This number is equivalent to 1 8 of all bird species, of which 179 species are under serious threat, 344 are at high risk of extinction, and another 688 are now very rare. In almost every country and region around the world, one or more species of birds are facing extinction.

There is a high concentration of endangered species of birds in some areas, such as the Andean tropics of South America, the forested areas of the Atlantic coast of Brazil, the eastern Himalayas, the eastern island of Madagascar and the island nations of Southeast Asia.

Various species of birds are threatened with extinction, with albatrosses being the most threatened, with 95 albatrosses at risk of extinction. 60 cranes, 29 parrots, 26 pheasants and 23 pigeons are endangered. There are fewer than 10,000 birds of 966 globally threatened species and fewer than 2,500 of each of the 502 bird species.

There are fewer than 50 of each of the 77 most dangerous bird species.

There were once 160,000 species of birds on Earth, and the Tertiary period was the heyday of birds. During the four major ice ages of the Pleistocene, about 25 birds went extinct and disappeared. After the advent of humans in the late Pleistocene, an average of one bird disappeared every 83 years.

1600 In the 300 years between 1900, 90 species of birds became extinct.

Among the reasons for the endangerment of birds, habitat destruction and alteration accounted for 60, human hunting accounted for 29, followed by invasive species competition, internationalization, pollution, etc.

According to surveys and estimates, the disappearance of each bird means the disappearance of 90 species of insects, 35 species of plants, and 2 3 species of fish associated with it. At the same time, for every two species of birds, one mammal is bound to disappear with it.

Escaped?!

You should be justifiedAlmost didn't dodgeThe anti-birds with better flying ability and more niche advantage are all hanging, 90% of the birds are also dead. If I'm not mistakenThere are only 3 sticksThe main birds survived, 2 of them were simply struggling [the flat-chested order where the ostrich is located, and the other is the penguin order], and most of the remaining birds are all from another branch of radiative evolution (so compared to mammals, the genetic diversity of birds is terrible. It is similar to avian flu, and it can be susceptible to infection in whole birds; Have you ever seen a pig or a human flu foci that mammals are generally susceptible to?!

Not! [Of course, the number of bird species exceeds the number of mammals, that's another story].

As for why you said that some of them survived?

Because of good luck

The mass extinction is not 100% complete destruction of the ecosystem (unless the earth is blown up), and the lower the energy level, the more complex the diet, the higher the probability of survival.

The three branches of the present birds that survived the mass extinction are all small birds that live on the ground. They do not depend on trees for their survival, but prefer to eat fungi, weeds, or penguins are plankton that fish for plankton every day, and they will make nests in the sand and soil to breed. So after the end of the Cretaceous period, there was a total collapse of gymnosperm forests, which had little effect on them.

As for how the branch of the Cenozoic radiation evolution took off again and became arboreal again, it is already the story after the Paleocene extreme heat event.