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The original feather is the nest of the bird, which can be divided into the first nest of raw feathers and the second nest of raw feathers, the first fossal feathers are the birds that come out of the nest around April, and the second nest of raw feathers is the nest around July.
The so-called alveolar tooth is a fossil group that is more primitive than dinosaurs, and this group is believed to have produced dinosaurs, birds, crocodiles and other major modern vertebrates, and it may have appeared a little earlier, than the Jurassic.
The Cretaceous is earlier than the Triassic.
Appear. This doctrine has been prevalent for about half a century since it was proposed.
Origins: The study of the origins of birds goes through a number of stages of the main ones.
Huxley, 1868.
The hypothesis that birds originated from dinosaurs was proposed. Huxley was a famous British biologist and Darwinian of evolution.
He was also one of the first scholars to propose the theory that birds originated from dinosaurs.
By 1927, Denmark.
In 1927, the paleontologist Heilman published a very classic book "The Origin of Birds", in which he proposed that although birds and dinosaurs are very similar, dinosaurs have been very specialized, so birds may not directly originate from dinosaurs, but have a common ancestor with dinosaurs, which is the alveolad tooth.
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The original hair is the nest of the bird, can be divided into the head of the nest and the second nest of the original hair, the head of the nest of the original hair is the nest of the bird around April, the second nest of the original hair is about July out of the nest. Whether it is the head fossa or the second fossa, until the first hair is changed, it is collectively referred to as raw hair. Because the raw wool does not survive long in the wild, its physical fitness is thin.
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Summary. Pro, indistinguishable, the shellfish does not distinguish between green feathers and full feathers. Shellfish are a race that comes in a variety of colors.
Some of them are jet-black, some are brown, some are dark brown, some are light brown, and so on. But this does not mean that they will be divided into green and qi hairs, as they are just made up of different colors and hairs, not a racial classification.
Do shellfish have full feathers and green feathers?
Pro, no distinction, the shellfish does not distinguish between green-haired early eggplant and full-haired eggplant. Shellfish are a race that comes in a variety of colors. Some of them are jet-black, some are brown, some are dark brown, some are light brown, and so on.
But that doesn't mean they're green and full, as they're just made up of different colors and hairs, not racial classifications.
Changed hairs in the wild! Isn't it called Qi Mao! Those who have changed their hair in the cage are called green hairs.
The shellfish bird is the common name for the coal. Coal refers to a with a body length of less than 11 cm.
Birds that have changed their feathers in the wild can have a variety of names, such as green spotted feathers, brown-winged feathers, etc., which are called feathers or feather finger shifts. The cage has changed the feather called the breeding feather and teased the nuclear feather, the color of this feather is not as lacking as the wild birds, and it is generally relatively simple.
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