Wu said the increase in the bird's population in the area is probably related to the improvement of the surrounding environment and the abundance and variety of food. The association has observed such birds nestling on the cliffs in the area.

"There are lots of insects and butterflies here, the favorite food for the bee-eater to feed their chicks," said Wu.

Local authorities have strengthened measures to protect the blue-tailed bee-eaters by building isolation belts and protective fences, and by putting up warning signs and disseminating information about bird protection.

Blue-tailed bee-eaters. [Photo/VCG]