Blue-tailed Emerald
Chlorostilbon mellisugus
Male blue-tailed emeralds are 7.5 to 9.5 cm (3.0 to 3.7 in) long and females 6.5 to 7.5 cm (2.6 to 3.0 in). Males of C. m. caribaeus average about 2.7 g (0.095 oz) and females about 2.5 g (0.088 oz). Males of C. m. phoeopygus average about 2.7 g (0.095 oz) and females about 2.4 g (0.085 oz). Both sexes of all subspecies have a short, straight, black bill. All of the males have a forked tail whose depth varies somewhat among the subspecies. Females are essentially indistinguisable from each other. Voice: The blue-tailed emerald's song has been described as "repeated 'tsip' or chwep notes, with occasional rolls or twitters". Its calls include "a relatively loud and harsh chirrrt and "soft 'tsip', 'pit' and 'chwep'" notes.
ID text from Wikipedia, CC BY-SA 4.0
Garden Emerald
Chlorostilbon assimilis
The garden emerald is 7.8 to 8.5 cm (3.1 to 3.3 in) long and weighs about 3 to 4.1 g (0.11 to 0.14 oz). The adult male has dark metallic green upperparts with bluish green uppertail coverts. Its forked tail is blue-black and the central feathers have a light bluish green gloss. Its underparts are a brighter metallic green than the upperparts, sometimes with a light blue sheen, and it has white thigh tufts. The adult female has bright metallic green to bronze green upperparts with bluish green uppertail coverts. Voice: The garden emerald's vocalizations are not well known but appear to be similar to those of Canivet's emerald (Cynanthus canivetii). That species' song is believed to be "an endlessly repeated, characterless wiry tseee tseeree" and its call has been described as "a dry, scratchy chut or chit, sometimes run together into a soft, staccato chatter".
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Blue-tailed Emerald and Garden Emerald.