Excuse me, what birds are these? (All shot in Chongming Island)

What is the picture below? Hongyan cygnus? Commonly known as Original Goose, Wild Goose, Hongyan, Yan Guan, Hongyan, Sui Goose, Strange Goose, Darkmouth Goose, Sand Goose and Grass Goose.

A big goose with a long neck. The long black mouth is in line with the forehead, with a narrow brownish-white stripe around the base of the mouth and two brownish-white stripes at the base of the cleft mouth. The upper body is grayish brown but the feather edge is yellow. The center of the top of the head and the back neck is brown, and the front neck is white, which has obvious boundaries with the back neck. This sharp contrast between the white front and the brown back is a remarkable feature that distinguishes Hongyan from other kinds of geese. The longest tail of this species is covered with pure white feathers, the rest are waist-colored, the tail feathers are gray-brown, and the tips and edges are white. The outer feathers of the primary flight feathers are gray-brown, the inner feathers are dark brown, the dry feathers are milky white, and the secondary flight feathers are dark brown. Different from white geese and white geese, the mouth is black, and the forehead and front neck are not so white. The iris is brown; Darkmouth; The feet are dark orange. When flying, make a typical goose call and lengthen the sound.

Egret is an egret bird.