Snow-white fur, streamlined structure of the whole body, iron beak and blue feet, long ones can't be increased by one point, short ones can't be reduced by one point, white ones can't be reduced by one point, and black ones can't be worn by one point.

Rhetorical devices such as contrast, length and contrast between black and white are used.

Egret is an exquisite poem. The combination of pigments, the size of the body, everything is suitable. Cranes are too big and stiff, such as pink ibis or grey ibis, and they are too big and unusual.

Extended data:

Egret "stands alone on the top of a small tree, which is scary enough, but it is leisurely and carefree." After reading this, I found that Guo Moruo wrote egrets on the surface, but actually wrote people.

Even an ordinary person should be enterprising, keep climbing and always give himself a strong smile. This is naturally Guo Moruo's self-portrayal. Because, in the whirlpool of revolution, he has always maintained the innocence of egrets and is more poised.