The Javan trogon (Apalharpactes reinwardtii) is a species of bird in the family Trogonidae. The species was once lumped together with the Sumatran trogon in a single species, the blue-tailed trogon, but differences in size, weight, and plumage have led to the two being split.[2] These two species were once lumped with the rest of the Asian trogons in the genus Harpactes, but have been split into their genus due to differences in plumage.
^Collar, N. & Van Ballen, S. (2002). "The Blue-tailed Trogon Harpactes (Apalharpactes) reinwardtii: species limits and conservation status" Forktail18 121-125