The White-bellied Dacnis forages in the canopy of mature terra firme forest, which is not seasonally flooded. Males have blue heads and breasts with white bellies; females have greenish upperparts and yellowish underparts.
Males have blue heads, backs, and breasts, a black mask through the golden eye, white bellies, and grayish flanks. Females have greenish upperparts, gray throats, and yellowish underparts.
It forages in the canopy of mature terra firme forest, the unflooded forest type named in the species account.
An extinction-risk assessment has not been added yet.