This sunbird is endemic to Príncipe Island in São Tomé and Príncipe. It uses lowland forest, scrub and cultivated areas, where it gleans small invertebrates.
An adult male photographed on Príncipe in 2024 shows an olive-green back, iridescent blue throat and slender down-curved bill.
It is described as sedentary and uses lowland forest, scrub and cultivation, including semi-open habitats.
Diet sources classify it as omnivorous and invertivorous, with arboreal gleaning of invertebrates reported.
An extinction-risk assessment has not been added yet.