How to change the original text of Bailu into an explanatory article?

Rewrite the second to fifth natural paragraphs of the text "White Deer" into an explanatory text:

The egret is a kind of flying bird with a thin body, about 60 cm in length, and an iron-colored beak. , with a slender neck, cyan feet, slender legs, feathers as white as snow, and a streamlined body structure.

The egret has a well-proportioned body and suitable pigmentation. Guo Moruo once commented on its appearance: "The snow-white fur, the streamlined structure of the whole body, the long iron-colored beak, and the cyan feet. If it is increased by one point, it is too long, and if it is reduced by one point, it is too short. One moment is too white, the other is too black."

The egret's sophistication puts other birds of the genus Egret to shame. Compared with it, the white crane is too big and blunt, while the pink ibis and gray heron are more delicate. However, compared to the egret, not only is it larger, but it is also too unusual to be compared with the egret.