The kingfisher is emerald blue with a brown ventral surface. Because of their outstanding fishing ability, they are called kingfishers.

They are usually in a straight position, perched next to the water, for a long time without moving, waiting for fish and shrimp to swim through.

It immediately in a rapid and fierce posture whenever it sees fish and shrimp, swooping straight into the water and catching them with its beak.

Sometimes, it can also be seen flying with wings 5-7 meters above the water, as if hanging in the air and looking down at the water. 

The emerald feathers of the kingfisher shine because of the refraction.

In ancient times, the nobles often used the kingfisher's feathers as decoration, and the color did not fade even after a long period.

The nest of the kingfisher is often built in the sandy soil of the field bank, dug into a tunnel, about 60 cm deep.

Kingfishers often act alone or in pairs.

They usually perch alone on the branches of trees or rocks near the water's edge, waiting for an opportunity to hunt.

The food is mainly small fish, eating crustaceans and a variety of aquatic insects and their larvae, but also pecking at small frogs and a few aquatic plants.

The common kingfisher is a typical small fish-eating kingfisher, with a body length of about 15 cm, and almost all of its food comes from the water.

The Common Kingfisher is the only kingfisher to be found in Europe and the only species whose range extends well beyond the three major ranges of the kingfisher.

From the islands of New Guinea and Solomon Islands in the southeast to Scotland, Ireland, Denmark, and Sweden in the northwest, and Ethiopia and Sudan in the southwest of Africa.

All other members of the genus Kingfisher are very similar to the common kingfisher, being small fish-eating kingfishers that feed largely from the water, and are mainly blue or blue-green.

Two species of the genus Kingfisher are found in Africa, the Flickering Blue Kingfisher, and the Half-collared Kingfisher, while the remaining species are found in the Asia-Pacific region.

The two species of kingfishers, the Spotted-headed Kingfisher and the Blue-eared Kingfisher look very similar to the common kingfisher, but the Spotted-headed Kingfisher is much larger, measuring 23 cm in length, making it the largest of the kingfisher subfamily.

The Blue-eared Kingfisher is comparable in size to the Common Kingfisher, but has blue ear feathers and a bluer body color than the Common Kingfisher, although the Common Kingfisher is widely distributed and has many subspecies, some of which also have blue ear feathers.

There is a kingfisher with the smallest body size in the kingfisher category.

The entire body length of this tiny kingfisher is only 11 cm at most, and it is found on the island of New Guinea and the surrounding islands, making it one of the smallest kingfishers we know of so far.