Emerald-chinned Hummingbird
Abeillia abeillei
The emerald-chinned hummingbird is 7 to 8.6 cm (2.8 to 3.4 in) long and weighs about 2.7 to 3.5 g (0.095 to 0.12 oz). Both sexes of both subspecies have a short, straight, dull black bill. The nominate adult male has metallic bronze green to greenish bronze upperparts. Its central pair of tail feathers are bronze green and the rest black with a faint bluish or bronzy gloss. All have brownish gray tips. Its face has a bold white spot behind the eye. Its chin and upper throat are brilliant metallic emerald green and the lower throat velvety black to dusky metallic bronze green. Voice: The emerald-chinned hummingbird's song is "a high, thin, slightly squeaking chipping, tsin, tisn-tsin tsin-tsin tsin-tsin, or tsi tsi tsi-si, tsi-tsi tsi tsi-tsi..." When foraging it gives "a liquid, rattling trill ... at times only single notes given, puip puip" and when perched "a sharp sii'ing".
ID text from Wikipedia, CC BY-SA 4.0
Golden-crowned Emerald
Cynanthus auriceps
The golden-crowned emerald is 7.5 to 9.5 cm (3.0 to 3.7 in) long and weighs about 2.2 g (0.078 oz). The adult male's crown is brilliant golden green and the rest of its upperparts duller golden green to bronzy green. Its underparts transition from an almost pure green on the chin and throat to brilliant golden green at the vent. The tail is long and deeply forked; its feathers are black with a violet-bluish gloss, and the central three pairs have broad brownish gray tips. The adult female's upperparts are like the male's. Its underparts are light gray that is palest on the belly and vent. Voice: The golden-crowned emerald has "dry, rattling and chattering calls".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Emerald-chinned Hummingbird and Golden-crowned Emerald.