Blue-eared Kingfisher is a small bird with 6 subspecies. There is only the Yunnan subspecies in China, which is distributed in Mengla, Yunnan. There are few records of its ecological biology in China. In 1960, the famous scientist Professor Zheng Zuoxin and others caught one by a river in Mengla.
The blue-eared kingfisher is solitary and usually lives alone on branches or rocks near the water, waiting for opportunities to hunt. Its food is mainly small fish, and it also eats crustaceans and a variety of aquatic insects and their larvae. It also eats small frogs and a small amount of aquatic plants. It flies and dives to the water surface to catch fish and shrimp with its sharp beak. They move alone or in pairs, standing on branches or rocks near the water for a long time and observing patiently. When they find small fish floating to the surface, they dive to the surface and catch the fish with their sharp beaks, then fly to trees or rocks to eat them. They dig tunnel-like caves in sandbanks or mud cliffs, lay eggs in them, and feed their young birds. Because of their unique hunting method, they are commonly known as "fishermen". They like to live and forage in ponds, swamps, and streams, and often rest quietly on the leaves in the water or on the branches of trees on rocks by the water. They stare at the water surface with their eyes fixed. Once they find food, they fly straight at lightning speed to catch it, and then return to their habitat to wait. Sometimes they fly on the water surface like a rocket, which is very beautiful. Because this bird loves to eat fish, people also call it "fish tiger", "water dog" and "fish dog". Call: a long-drawn scream, tea-cher.
The breeding season of the Blue-eared Kingfisher is from April to August. It nests on the cliffs on the banks of the river in the forest. It digs its own holes to build its nest. The blue-eared kingfisher can use its thick beak to dig holes in the earth cliffs to build nests. It also builds nests in tunnels on field embankments. The nest chamber is spherical. Like woodpeckers, these cave birds generally do not have bedding at the bottom of the cave. The eggs are laid directly on the ground of the nest. Each nest has 6-8 eggs. The eggs are pure white, bright, slightly spotted, and are about 28 mm × 18 mm in size. There are 1-2 nests per year; the incubation period is about 21 days. The male and female incubate the eggs together, but only the female feeds the chicks.
Listed in the "Red List of Threatened Species of the World Conservation Union" (IUCN) 2016 ver 3.1-Least Concern (LC).
Listed in the second level of China's "National Key Protected Wildlife List" (February 5, 2021).
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