What's the difference between a red-crowned crane and a swan?

The difference between the red-crowned crane and the swan: different shapes, different living habits and different predation habits.

1, different shapes

Red-crowned crane: The whole body is almost pure white, and the top of the head is bare and hairless, vermilion. The forehead and eyes are slightly Kuroha, the ear feathers behind the eyes are white to pillow-shaped, and the cheeks, throat and neck are black. The iris is brown, the mouth is grayish green, and the tip is yellow. The exposed parts of tibia, tarsometatarsal and toes are gray-black, and the claws are gray.

The chicks are covered with tawny down feathers, with light back, deep abdomen, milky white shoulders and red mouth and legs. After 3~4 months, the body feathers gradually turned white, and the exposed part of the top of the head did not appear red until 10 months later.

Red-crowned crane:

Swan:

Swan: the neck is equal to or longer than the body; The mouth shape is moderate, the base height is flat at the front end, and the mouth nail is located in the middle of the mouth end, but it does not occupy all of the mouth end; Adult eyes are exposed first; The nose is oval and located near the bottom of the mouth.

2. Different living habits

Red-crowned crane: often in pairs or in groups or small groups. In the migration season and winter, several or dozens of family groups often form larger groups. Sometimes there are as many as 40~50 clusters, even more than 100. However, when they are active, they are still scattered in small groups or family groups in a certain area.

Swan: In China, they fly from the south to the north in large groups every March and April, and lay eggs and breed in the northern border province of China. The female swan lays 2 or 3 eggs every May, and then the female goose hatches the eggs, and the male goose guards them and never leaves. After June 5438+ 10, they will go south in droves. Overwintering and recuperating in the warmer south.

3. Different predation habits

Red-crowned crane: The food is very miscellaneous, mainly including the stems, leaves, tubers, bulbs and fruits of fish, shrimp, aquatic insects, mollusks, tadpoles, nereis, clams, snails and aquatic plants.

Swan: It mainly eats aquatic plants, but also snails and mollusks.

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