What is the picture below? Night heron? Nycticorax nycticorax, commonly known as grey wretched, night wretched, star goose and blackbird.

The body length is about 40 cm to 65 cm, the top of the head and the back of the pillow are dark blue gray with a slight metallic luster, the upper body and the rest of the wings are dignified dark gray, the eyebrows are white and connected at the forehead, and the lower body is slightly ivory white. There are two or three slender white withered feathers on the top of the head, which stand out against the dark blue and gray upper body. These two or three withered feathers sway with the movement of the head and look very good. The iris is blood red and the beak is black and yellow. Young birds have the same body length as adult birds, the upper body is grayish brown with short brown longitudinal spots, and the white spots on the wings are formed by white end spots at the tip of feathers. The lower body is nearly white, densely covered with brown fine longitudinal stripes, with a black beak and yellow-green feet.

Night herons mainly feed on aquatic animals such as frogs, small fish and shrimps, and occasionally eat some plant food; Frightened night herons will spit out the food they eat, and the digested or undigested food will stink as a defense. We can also get clues to study the feeding habits of night herons.