Appearance
Green thorntail has mainly green upperparts, a white rump band and a blackish lower rump and tail. It weighs just 3 g. The 10 cm long male has the long wire-like tail that gives this species its name and green underparts. The 7.5 cm long female lacks the long tail and has blackish underparts with a green breast band. She has conspicuous white moustaches
Behavior
The green thorntail is usually silent, but may give a quiet ''chip''. These birds visit small flowers including those of epiphytes and shrubs, and also take tiny flies and wasps. Breeding males perch on open branches and may give a dive display.
Reproduction
This is a forest canopy species. The nest is undescribed, but a published image shows a female constructing a nest on a thin branch, so it is presumably similar to other cup nests built by species such as the green-breasted mango. All hummingbirds lay two white eggs incubated by the female alone.References:
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