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Harpactes is a genus of birds in the family Trogonidae found in forests in South and Southeast Asia, extending into southernmost China.

1/ Red-headed trogon (Nuốc bụng đỏ, Harpactes erythrocephalus)
The epithet comes from the Ancient Greek terms eruthros meaning red, and kephale meaning head.
2/ Orange-breasted trogon (Nuốc bụng vàng, Harpactes oreskios)
3/ Ward's trogon (Nuốc đuôi hồng, Harpactes wardi)

Trogonidae is the single bird family in the order Trogoniformes. The family includes birds which are often referred to as trogon or quetzal.

Trogoniformes is a bird order which which contains only one bird family, the Trogonidae.