There are more than 9,000 known species of birds in the world. Our common birds include: ostriches, hummingbirds, penguins, vultures, egrets, golden eagles, kestrels, woodpeckers, cuckoos, pigeons, etc.

1. Ostrich

The ostrich (scientific name: Struthio camelus) is the only species of the Ostrichidae family. It is a huge, flightless but fast-running bird in Africa. It is also the largest living bird in the world. Living on the African grasslands. It can reach a height of 2.5 meters, with black and white feathers all over its body, a long and hairless neck, short wings, and long legs.

2. Hummingbird

The hummingbird is the smallest bird in the world and the smallest warm-blooded animal (ectotherm). Hummingbirds are brightly colored and are often placed in the order Apodiformes (Apodiformes) with swifts, or they can also be placed separately in the order Hummingbirds (Trochiliformes). ?

3. Penguins

Penguins are birds, but unlike ordinary birds, they do not have the ability to fly, but they are good at swimming. Penguins are nomadic birds because their forelimbs are similar to the fins of fish, so they can swim in the water and dive to the bottom of the sea to hunt for food, thereby meeting the normal needs of its growth. Penguins also have no feathers because their body temperature is constant and they have a thick layer of fat under their skin to keep them warm.

4. Vulture

Vulture (scientific name: Aegypius monachus): ? Large raptor, body length 108-120cm. The whole body is dark brown, the head is bare, and it is only covered with short dark brown down feathers. The back neck is completely bare without feathers, and the base of the neck is covered with ruffled feathers formed by long black or light brown white feather clusters. Young birds are lighter in color than adults and have more exposed heads, making them easier to identify.

5. Egret

Egret, also known as little egret, egret, white-feathered egret, is a medium-sized wading bird and belongs to the genus Egret of the family Egretidae. There are 13 species of birds in the genus Egret, including great egret, medium egret, little egret, yellow-billed egret and snowy egret, all of which have all white body feathers and are commonly known as egrets. The Great Egret is large in size and has no crest and chest feathers. The Medium Egret is medium in size and has no crest but chest feathers. The White Egret and Snowy Egret are the smallest in size and have both crest and chest feathers.

6. Golden Eagle

The golden eagle (scientific name: Aquila chrysaetos) belongs to the Accipitridae family and is a well-known raptor in the northern hemisphere. Golden eagles are famous for their prominent appearance and agile and powerful flight; the wingspan of an adult bird averages more than 2 meters, the body length can reach 1 meter, and its legs and claws are all covered with feathers.

7. Kestrel

The kestrel (scientific name: Falco tinnunculus) is one of the small birds of prey in the family Falconidae. The beak is short, with toothed processes on both sides of the tip, and the base is not covered with wax film or whisker-like feathers; the nostrils are round, and a columnar bone stick can be seen inward from the nostrils; the wings are long and narrow, with a fast wing-beating rhythm; the tail is thin long. It flies quickly and is good at hovering in the air to observe and wait for opportunities to catch prey.

8. Woodpeckers

Woodpeckers are well-known forest beneficial birds. In addition to destroying pests under the bark such as beetle larvae, their wood-cutting marks can be used as indicators of forest sanitary logging. . It is a common resident bird, and species widely distributed in my country include green woodpecker and spotted woodpecker. They forage for beetles, gird bugs, hyaline moths, stink bugs and other pests, and can eat about 1,500 of them every day.

9. Cuckoo

Cuckoo is also called Du Yu, Zigui and Cuigui. It always chirps toward the north, and its chirps are even louder in June and July, day and night, and the sound it makes is extremely sad. So it is called the cuckoo's crow. Alias: Zigui, cuckoo, Du Yu, 闗鴃 (tí jué), often refers to about 60 arboreal species of the cuckoo subfamily and the cuckoo subfamily.

10. Pigeon

Pigeon is a very common bird that is widely raised all over the world. Pigeon is the collective name for hundreds of species of birds in the family Doveidae. The pigeon we usually call is just one type of pigeon, and it is a domestic pigeon. The most common domestic pigeon is the homing pigeon, which is mainly used for communication and racing.

Introduction to birds

Birds are also called birds.

Definition: An egg-laying vertebrate whose body is covered with feathers. The main characteristics of a bird are: its body is streamlined (spindle or fusiform) and most of its life is flying. The body surface is covered with feathers, and the forelimbs usually turn into wings (some species have vestigial wings); the chest muscles are well developed; the rectum is short, and the food intake is large and the food is digested quickly, that is, the digestive system is developed, which helps to reduce weight and facilitate flight.

The heart has two atria and two ventricles, and the number of heart beats is fast. Body temperature is constant. In addition to lungs, the respiratory organs also have multiple air sacs to assist breathing, so that oxygen passes through the lungs when birds inhale and exhale, that is, double breathing.

The above information refers to Baidu Encyclopedia