Pair bond: Not much is known about the specifics of Emerald Tanager sexual behavior. In the case of the closely related Silver-throated Tanager (Tangara icterocephala), mated pairs can be found year-round, althoug these bonds can become looser after mating season (Skutch 1954: 229). The Emerald Tanager has a mating season ranging from March to May in Costa Rica (Stiles and Skutch 1989) and January to April in Colombia (Isler and Isler 1987).
Nest: Little is known about reproductive behaviors of the Emerald Tanager. In Colombia, two mossy cup nests were found 8 and 12 m off the ground on branches covered with moss and epiphytes (Isler and Isler 1987). In Costa Rica two nests were observed about that appeared to be made from moss, one a small burrow within the moss on a branch, and the other made from a ball of moss with a small cup about 1.5 m from the ground (Isler and Isler 1987).
Eggs: There have been only a limited number of reports involving eggs, and none include egg color or shape. In all observations, the Emerald Tanager lays 2 eggs (Hilty and Brown 1986, Isler and Isler 1987). The sister species the Silver-throated Tanager lays dull white or grayish eggs that have brown mottling concentrated on the larger end of the egg (Skutch 1954).
Incubation: No information.
Parental care: There is one observation of a pair of Emerald Tanagers carrying insects and fruit to a nest in Colombia (Isler and Isler 1987).
Cooperative breeding: No information.
Brood parasitism: No information.