1. First, draw the shape of a leaf, which is pointed at both ends and slender, to make a bird's wing.
2. Then draw the bird's body, draw a slender outline, and draw a pointed tail behind it.
3. Then draw the bird's eyes, the sharp mouth in front and the bird's claws under the body.
4. Finally, draw pictures. First, paint the bird's body red and its wings yellow, and the bird's stick figure is completed.
Birds, also known as birds. Definition: Egg-laying vertebrates covered with feathers. The main characteristics of birds are: streamlined bodies (spindle or spindle), most of which can fly.
The body surface is covered with feathers, and the forelimbs generally become wings (some kinds of wings degenerate); The pectoral muscles are developed; Short rectum, large appetite and fast digestion, that is, the digestive system is developed, which helps to lose weight; The heart has two atria and two ventricles, and its heartbeat is fast. The body temperature is constant. In addition to the lungs, the respiratory organs also have multiple airbags to assist breathing.
Birds are higher vertebrates that adapt to life on land and in the air. Long feathers can keep the body warm; There are protruding keel processes on the chest, and there are many gaps in the whole body bones, which are full of qi, so they are light; The forelegs become wings, and the hind legs walk. Most of them can fly and have a wide range of activities. Some of them can't fly because of the degradation of wings, so the activity area is relatively small.