Birds that catch fish are called cormorants, also called water crows and osprey. Cormorants are large fish-eating birds that are good at diving. Often domesticated for fishing, tied to the throat and forcibly spit out after being caught. In many places in China, cormorants are called niggers, which shows their superb fishing skills.

Birds that catch fish are called cormorants, also called water crows and osprey. Cormorants are large fish-eating birds. They are good at diving. After diving, their feathers are soaked, so they need to spread their wings and dry them in the sun before flying. The mouth is strong and long, conical, with a pointed hook at the top, suitable for pecking fish, and a pouch under the throat. The foot is in the posterior position, the toe is flat, the hind toe is long, and there are full webbed feet. Habitat in Yu Haibin and lakes. When flying, the neck and feet are straight. Often domesticated for fishing, tied to the throat and forcibly spit out after being caught. Widely distributed in marine and inland waters all over the world, especially in warm zone waters. There are five kinds in China. In many places in China, cormorants are called niggers to describe this kind of bird. They are not as stupid as boobies, but they have excellent fishing skills.

The representative species is the common cormorant, with black body, purple-green luster on the head and neck, bronze luster on the shoulders and wings, yellow-green color on the corners of the mouth and throat pouch, white under the eyes, red spots on the face during the breeding period, white silky feathers on the head and neck, and white spots on the lower side. Feeding on all kinds of fish, mainly by diving.