The Plain Sunbird is a small bird with olive-green upperparts and yellowish underparts. It lacks the iridescent patches of many sunbirds and feeds on nectar and small insects.
It is olive-green above and yellowish below, with none of the bright iridescent patches found on some other sunbirds.
It takes nectar and small insects at flowering trees and shrubs, especially along forest edges and in coastal vegetation.
An extinction-risk assessment has not been added yet.