1 Prepare origami, fold it in half along the center line, and then fold it diagonally.

Fold the origami into a new square along the crease.

3 fold, restore the original appearance, and complete the reference line.

Crane is a general term for crane birds, and it is a beautiful and elegant large wading bird. Crane family is divided into crane subfamily and crown subfamily, 2 subfamilies, 4 genera 15 species. Among them, there are 3 genera 13 species of crane subfamily, which are distributed in all continents except South America. In East Asia, China has 2 genera and 9 species, accounting for more than half of the crane 15 species in the world, making it the country with the largest number of cranes.

These nine kinds of cranes are national key protected wild animals in China. The hind toes of crane subfamily are small and high, so they can't support the first three toes, so they can't live in trees.

There are 2 species 1 genus of Coronae, which are endemic to Africa. Unlike cranes, crowned cranes can live in trees. Crane has a lofty position in China culture, especially the red-crowned crane, which is a symbol of longevity, auspiciousness and elegance. Often associated with immortals, it is also called "crane".

Gruidae (scientific name: Gruidae) belongs to Carnivora in bird taxonomy, and its members include many famous cranes, belonging to four genera. Both Crested Crane and Gallus are distributed in sub-Saharan Africa.

There are two kinds of demoiselle cranes, among which demoiselle crane is the smallest crane in the world. There are 10 species of cranes, and 8 species in China. There are 15 kinds of cranes in the world, which are distributed in other continents except South America and Antarctica.

Also known as fairy bird, its feathers are yellow, white and black, among which the best is white hair, which is about three feet long, more than three feet high and its beak is about four inches long. The cheeks and eyes on the top of the head are red, the feet are blue, the neck is slender, and the knees are thick and thin. The trunk is white with feathers, the wings and tail are black with feathers, and the reproduction is gray. Its direct call is particularly loud.