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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)

Orange-breasted trogon 
(Nuốc bụng vàng, Harpactes oreskios)
The orange-breasted trogon (Harpactes oreskios) is a species of bird in the family Trogonidae.

The harpax or harpago (Koinē Greek: ἅρπαγα lit. "grabber, seizer, robber"; GEN ἅρπαγος harpagos)
(a Roman catapult-shot grapnel created by Marcus Vipsanius Agrippa for use against Sextus Pompey during the naval battles of the Sicilian revolt.)

Red-Headed Trogon 
(Nuốc bụng đỏ, Harpactes erythrocephalus)

The red-headed trogon (Harpactes erythrocephalus) is a species of bird in the family Trogonidae.

The epithet erythrocephalus comes from the Ancient Greek terms eruthros meaning red, and kephale meaning head.