Which mammals, birds, insects and fish are beneficial to humans?

Since ancient times, any animal that can be effectively and sustainably used by humans and does not harm humans or the living environment is basically a beneficial animal. Such as the dog, pig, and sheep among mammals; the crested myna and woodpecker among birds; the honeybee and dragonfly among insects; and the yellow croaker, crucian carp, and common carp among fish.

1. Mammals beneficial to humans:

1. Dog

2. Pig

3. Ox

4. Sheep

5. Domestic rabbit

Note: The domestic rabbit was bred from a wild burrowing rabbit through domestication and rearing. Large domestic rabbits such as the Flemish Giant can weigh up to 8 kg. The smaller Dutch Dwarf rabbit weighs less than 1 kg at adulthood. The upper lip is split, called a hare lip, and thus often exposes the upper incisors. The forelimbs are short, with the elbows curved backward, and the front paws have 5 toes. The hind limbs are long and strong, with the knees curved forward, and the hind paws have 4 toes, with the first toe degenerated, making them good at running and jumping. The ears are long and the tail is short. The whole body is covered with fur, and the body surface fur is smooth and soft, providing good insulation.

2. Birds beneficial to humans:

1. Sparrow

2. Cuckoo

3. Wild duck

4. Crested myna

5. Pigeon

6. Woodpecker

7. Azure-winged magpie

8. Owl

Note: The owl is an order under the class Aves, and is a nocturnal bird of prey. The beak is strong and hooked, and the cere at the base of the bill is covered by bristles. The shape of the wings varies, and the fifth secondary feather is missing. The tail is short and rounded, with 12 tail feathers, sometimes only 10. The feet are strong and powerful, often entirely feathered, and the fourth toe can rotate backward to aid climbing. The claws are large and sharp. The chicks are altricial. The uropygial gland is bare. There are no aftershaft feathers, or they are occasionally retained. The ear openings have ear tufts around their edges, which help distinguish sounds at night and with night positioning. They nest in tree holes or rock crevices.

3. Insects beneficial to humans:

1. Dragonfly

2. Praying mantis

3. Honeybee

Note: The honeybee belongs to the order Hymenoptera and the family Apidae. The body length is 8—20 mm, yellow-brown or dark brown, with dense hair. The head and thorax are almost equally wide, the antennae are geniculate, the compound eyes are oval and hairy, the mouthparts are chewing-lapping, and the hind legs are pollen-carrying legs. There are two pairs of membranous wings; the forewings are large and the hindwings are small, and the forewings and hindwings are linked by a row of wing hooks. The abdomen is approximately oval, with less body hair than the thorax, and there is a sting at the end of the abdomen. In its lifetime it goes through four stages: egg, larva, pupa, and adult.

4. Fish beneficial to humans:

1. Bighead carp

2. Crucian carp

3. Silver carp

4. Chub mackerel

5. Largehead hairtail

6. Yellow croaker

7. Common carp

Note: The yellow croaker, divided into large and small yellow croaker, is also called the yellow flower fish. It belongs to the class Osteichthyes and the family Sciaenidae. There are two hard stones in the fish head, called otoliths, hence it is also named “stone-head fish”. The large yellow croaker is also called large fresh, large yellow flower, and osmanthus yellow croaker. The small yellow croaker is also called small fresh, small yellow flower, and small cucumber fish. The yellow croaker has an omnivorous diet, mainly feeding on fish and shrimp. The large yellow croaker produced in China's Zhoushan fishing ground is the most famous.

It is a scaleless sea fish. Its shape is like a sturgeon, grayish-white in color, with three rows of bony plates on its back, whiskers growing above the nose, its mouth near the lower jaw, and a forked tail. It grows in deep water. Meat: nature and flavor, sweet in taste, neutral in nature, slightly toxic.