What are the animals with two legs?

There are many animals with two legs, such as sparrows, seagulls, red-crowned cranes, peacocks and penguins.

2. Birds are bipedal constant-temperature oviparous vertebrates. They are covered with feathers, and their forelimbs have evolved into wings, beaks and no teeth. The body is streamlined and most people live by flying. 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.

3. Sparrows are hermaphroditic birds of Sparidae. Their distinctive features are black throat, black spots on white cheeks and chestnut heads. Like to live in groups, the population is extremely vital. It is the most common and widely distributed bird in China, with many subspecies differentiation, widely distributed in China and Eurasia.

4. Seagull is a medium-sized seagull. Legs and spotless rings have narrow green and yellow mouths, white tails, white tips of primary flight feathers, and large white wing mirrors. In winter, the head and neck are scattered with brown fine lines, and sometimes the corners of the mouth are black. Seagulls are handsome and charming, and their lower feathers are as white as snow.

5. The red-crowned crane is a kind of crane, a large wading bird with a body length of 120~ 160 cm. The neck and feet are long, mostly white, the top of the head is bright red, the throat and neck are black, the ears to the headrest are white, the feet are black, the tail feathers and feet are black when standing, the top of the head is red, and the rest are white; When flying, only the second and third flight feathers, neck and feet are black, and the rest are white, which is extremely obvious and easy to identify.

6. Peacock: There are only 2 genera and 3 species. Peacock includes two species, both of which are more than 2 meters, of which the tail screen is about 1.5 meters, which is the largest in the order galliformes. The top of the head is green, the crown is blue-green and pointed; Tail feathers are particularly long, forming a tail screen, which is bright and beautiful; The real tail feather is short and dark brown. The female bird has no tail screen and dark brown feathers, many-hued.

7. Penguin: Penguin, known as the boat of the ocean, is one of the oldest swimming birds. It mainly lives in the southern hemisphere and belongs to the genus Penguinidae. The back is black and the abdomen is white. The main differences between species are head color and individual size.