Where do all the birds in the neighborhood come from? Ten common species of birds in the community

Some of the birds in the community have flown back there before, and some birds feel that the environment is good and settle down.

There are also a lot of birds in the city, **suitable for survival**.

The ten common birds in the community are blackbirds, pearl-necked turtle doves, bald bulbuls, tree sparrows, mercerized starlings, collared birdbills, magpie robins, night herons, brown-backed shrikes, and house swallows.

1. Blackbird: a bird that is most seen in the community, the male is roughly black all over the body, the beak is orange or yellow, and the feet are black. The song is beautiful, commonly known as the hundred tongue bird, and it will imitate.

2. Pearl-necked turtledove: The most obvious feature is the black patches full of white spots on the side of the neck, we call her the prince and princess "with a pearl necklace".

3. White-headed bulbul: white from the top of the eyes to the back occipital, forming a white occipital ring, and the abdomen is white with yellow-green longitudinal lines.

4. Tree sparrow: white on the side of the head, with a black spot on the ear, which is the most obvious difference from the house sparrow and other sparrows.

5. Mercerized starling: vermilion beak and orange-yellow feet. The head and neck of the male are satissy white.

6. Collared birdbilled bulbul: dressed in green clothes, with a white neck ring on the front neck, it is difficult to distinguish if you hide in the leaves and are not careful.

7. Magpie robin: When resting, it likes to put its tail on its back, and often jumps while chirping.

8. Night Heron: The occipital part is covered with 2-3 long ribbon-like white ornamental feathers, which is very eye-catching.

9. Brown-backed shrike: the forehead is black, and the eyes, eye area and ear feathers are black, forming a broad black eye pattern.

10. House Swallow: A bird that children are most familiar with, and the "scissor-like tail" in the textbook is also about it.

I have never seen this bird, this bird is rarely seen, and the whole form looks very beautiful and atmospheric.

BirdsBirds are usually feathered, oviparous animals with extremely high metabolic rates, and their long bones are mostly hollow, so most birds can fly. Birds evolved from reptiles, and there are more than 9,000 species of birds in the world, all of which have wings and feathers, even those that have lost the ability to fly (such as ostriches, penguins, etc.). The first birds appeared 100 million years ago.

The body is spindle-shaped, the forelimbs are specialized into wings, the body surface has feathers, the body temperature is constant, the musculothoracic is developed, the bones are healed, thin, hollow, and the brain is relatively developed. Having an air bag allows for double breathing, and not having a bladder can reduce body mass. These physical traits are well adapted to flying.

Birds have no teeth but have beaks that can be used to hunt, build nests, and groom their feathers. Birds are good at building nests, and they can build all kinds of nests from the materials they collect. Ornithischia is taxonomically a class under the subphylum Vertebrates.

Feathered birds are the only animals on Earth that have feathers. The vast majority of a bird's body surface is covered with feathers, which not only keep the bird at a constant body temperature, but also allow it to fly. Birds have different shapes of feathers.

The ** of the structure of a feather has a hard shaft, called the feather shaft, the upper feather part is called the feather trunk, and the lower part inserted ** is called the feather root. The feather trunk is flanked by feathers, which are made up of a tough substance called keratin, which in turn is made up of feathers and branchlets.

Growth feathers are formed from the follicular vesicles of the feathers on birds**, and the parts are combined together in a special way. Most birds moult at least once a year, when new feathers grow and old feathers fall off. Birds renew their already damaged feathers through moulting.

Newborn birds usually moult twice a year, which shows that their feathers have a strong ability to regenerate. Scientific studies have shown that feather stem cells are distributed in a ring on the wall of the feather follicular vesicle, which can proliferate and differentiate, and the differentiated cells grow upwards to produce feathers. The proliferation and differentiation of feather stem cells allows the entire feather organ of birds to grow and regenerate.

Types of bird feathers can be broadly divided into four types: body feathers, down feathers, tail feathers, and wing feathers.

The body feathers cover the whole body, forming a smooth, streamlined body surface of birds; The down is fluffy, so that the warm air will not dissipate quickly; The tail feathers and wing feathers are more powerful and are used for flight.