Harpactes oreskios, a medium-sized trogon measuring around 30 cm in length is commonly known as orange-breasted trogon due to its orange breast. Both male and female orange-breasted trogon have bluish orbital skin and shows dimorphism in which the male did not have red plumage, has olive-green head and throat, chestnut mantle and bright orange breast grading into orange-yellow underparts. In comparison, the female has an olive-green mantle, duller olive-green head and throat and paler orange-yellow underparts. The juvenile male looks similar to the juvenile female but has a chestnut mantle, scapulars and back while the juvenile female’s head, upperparts and breast have a tone of rufous-chestnut.

Orange-breasted trogon occurs in Southwest China, Southeast Asia, Sumatra, Java and Borneo. It is a locally common resident in hilly countries from 60 to 1200 m. This species feeds alone or in pairs and frequents the middle storey to perch and search for insect prey.