Land birds

In the future, human beings will be extinct, plants will be out of control, and the growth will accelerate, resulting in the gradual reduction of the food source of land birds. In order to eat high food, they have evolved a longer neck, and a large number of spread feathers help to absorb sunlight. In order to avoid direct sunlight, their eyes gradually degenerate, and then grow more nasal cavities, which depend on smell and sound.

However, a large number of land birds gather together to block the sunlight from reaching the ground, resulting in a sudden drop in ground temperature, so their bodies grow thick feathers. Strong forearms are enough to support a huge body. They also have a pouch in their belly to help their cubs keep warm. The long and flexible tail can drive away mosquitoes.