What are the mammals, birds, insects and fish that are beneficial to human beings?

Since ancient times, animals that can be effectively and continuously used by human beings and do not cause harm to the human living environment are basically beneficial animals. Such as mammalian dogs, pigs and sheep; starlings and woodpeckers of birds; bees and dragonflies of insects; yellow croaker, crucian carp and carp of fish.

1. Mammals that are beneficial to human beings:

1. Dogs

2. Pigs

3. Cattle

4. Sheep

5. Rabbits

Attachment: the rabbit is domesticated and raised by a kind of wild cave rabbit. Large rabbits, such as ram rabbits, can weigh up to 8 kilograms. The smaller Dutch dwarf rabbit weighs less than 1 kilogram in adulthood. The upper lip is split, known as the cleft lip, which often exposes the upper incisor. The forelegs are short, the elbows are bent backward, and the front claws have 5 toes. The hind legs are long and strong, the knees are bent forward, the hind claws are 4 toes, the first toe is degenerated, and is good at running and jumping. Long ears and short tail. The whole body is covered with hair, and the hair on the body surface is smooth and soft, which has a good effect of heat preservation.

2. Birds and animals that are beneficial to human beings:

1. Sparrow

2. Rhododendron

3. Wild duck

4. Starling

5. Pigeons

6. Woodpecker

7. Grey magpie

8. Owls

Attachment: owls are an order of birds and nocturnal birds of prey. The beak is strong and crooked, and the wax film at the base of the mouth is covered by hard whiskers. The wing has different shapes, and the fifth secondary feather is missing. The tail is short and round, with 12 tail feathers, sometimes only 10. The foot is strong and powerful, often completely feathered, and the fourth toe can be turned backward to facilitate climbing. The claws are big and sharp. The nestling is a late adult. The tail fat gland is naked. No accessory feathers, occasionally retained. There are ear feathers around the ear foramen, which is helpful to distinguish sound and location at night. Nest in tree holes or crevices.

3. Insects that are beneficial to human beings:

1. Dragonfly

2. Mantis

3. Bees

Attachment: honeybees belong to Hymenoptera and Honeybee family. It is 20 mm long, yellowish brown or dark brown, with dense hairs. The head is almost as wide as the chest, the antennae are knee-shaped, the compound eyes are oval, hairy, chewing and sucking, and the hind feet are powder-carrying feet. Two pairs of membranous wings; the front wings are large, the hind wings are small, and the front and rear wings are linked by wing hooks. The abdomen is approximately oval, the body hair is less than the chest, and there are chelate needles at the end of the abdomen. The whole life has to go through four states: egg, larva, pupa and adult.

4. Fish animals that are beneficial to human beings:

1. Bighead carp

2. Crucian carp

3. Silver carp

4. Mackerel

5. Belt fish

6. Yellow croaker

7. Carp

Attachment: yellow croaker, there are large and small yellow croaker, also known as yellow croaker. Belongs to fish class, stone head fish family. There are two hard stones in the fish's head, called fish brain stone, hence the synonym "stone head fish". Pseudosciaena Crocea is also known as Daxian, Rhubarb, Osmanthus yellow croaker. Small yellow croaker, also known as small fresh, small yellow flower, small cucumber fish. Yellow croaker has miscellaneous food habits and mainly feeds on fish and shrimp. It is most famous for producing large yellow croaker in Zhoushan fishing ground of our country.

It's a sea fish without scales. It is shaped like a Sturgeon, gray in color, with three rows of bone armour on its back, a beard on its nose, its mouth near the chin and a bifurcated tail. It grows in deep water. Meat: natural taste, sweet taste, flat sex, a little poison.