White-bellied Emerald

The nominate subspecies of white-bellied emerald is 8 to 11 cm (3.1 to 4.3 in) long and weighs 2.9 to 4.3 g (0.10 to 0.15 oz). Adults' upperparts are metallic bronze to bronzy green, with the back usually greener than the crown and neck. The underparts are white with metallic bronzy green from the cheeks to the flanks. The tail is metallic bronze; all but the central pair of feathers have a broad purplish bronze or blackish band near the end, and the outermost two pairs also have dull brownish gray tips. Voice: The white-bellied emerald's song is a "varied, high, thin, slightly shrill chipping, tsi'si-sit' tsi-tsin', also described as "a monotonous, high, squeaky tssi-ip tssi-ip ... or tsip tsip ... etc." Its calls are "mostly rolled or trilled chips, trirr and ti-ti or tsi-tsir, and longer drii-i-i-it and tsi si-si-si-sit, etc."