- Chlorostilbon assimilis
7Â·8â€“8Â·5 cm (3-3Â¼ in) Bill black, short, and straight 1.25cm (Â½ in)
Male: entirely metallic green with white leg tufts (usually not visible in the field). Tail blue-black and forked.
Female: Green above. Face dusky with buffy streak beind eye. Pale grey below with some green on sides. Tail blue-black with greyish tips to outers. Not forked.
 Similar species
Canivet's Emerald with red in the bill and in male a stronger fork in the tail, and Steely-vented Hummingbird with different colors on the back.
Central America: found on the Pacific slope of south-western Costa Rica and Panama; Coiba and Pearl Island.
This monotypic species was considered part of the Blue-tailed Emerald complex in the past (at its most extreme also including Canivet's Emerald.
Quite common in open areas, gardens and woodland egdes in lowlands and some foothills.
Usually seen feeding on flowers close to the ground. Higher when trees in flower.
- Clements, J. F., T. S. Schulenberg, M. J. Iliff, D. Roberson, T. A. Fredericks, B. L. Sullivan, and C. L. Wood. 2014. The eBird/Clements checklist of birds of the world: Version 6.9., with updates to August 2014. Downloaded from http://www.birds.cornell.edu/clementschecklist/download/
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