The golden starfrontlet or golden-tailed starfrontlet (Coeligena bonapartei eos) is usuually considered a subspecies of hummingbird endemic to Venezuela. It is often considered a subspecies of the golden-bellied starfrontlet, C. bonapartei.
In appearance it strongly resembles the golden-bellied starfrontlet, though it is 0.1 gram heavier at 6.6 g and has a bill that is 3 mm shorter at 30 mm. This species is more golden-bronze overall and has a mostly rufous tail and secondary wing feathers. source