Halcyon leucocephala, Gray-headed Kingfisher, Chestnut-bellied Kingfisher, there are five subspecies.
The grey-headed emerald bird song is usually like a cry, and is made up of a set of "it, it, it, it, it, it, it," fast, rough, and rolling. But it also produces a set of fast "tchi-tchi-tchi-tchi tchi" and fast staccato sounds。
The grey-headed emerald is entirely carnivorous. It eats mainly main locusts, a wide variety of insects and arthropods, but also small vertebrates such as small fish, small snakes and lizards, young birds in the nest and small mammals。
The grey-headed emerald nests on earth cliffs or river embankments, using their mouths to dig tunnelled burrows, 50 cm and 1 m deep. These caves are generally bare of bedding. The eggs are laid directly on the nest ground. The female lays three eggs at a time, which are incubated by both parents for 16 to 21 days. Eggs are nearly round, pure white.
Listed on the International Union for Conservation of Nature (IUCN) Red List Protection Level: Not Threatened (LC).
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