Medium-sized sunbird with a fairly straight dark bill. Brightly-colored has an iridescent green back, yellowish belly, and reddish wings, face, and throat. Female is dull brownish yellow overall, with an olive-tinged back and wings. Plain-throated Sunbird is very similar in all plumages; male of that species has more prevalent bluish iridescence and minimal reddish coloration, while female Plain-throated has a slightly narrower eyering (best identified when accompanied by a male though). Where the two overlap, Red-throated tends to be much less common, especially in artificial habitats such as parks and gardens, though it does occur in secondary growth and forest edge, as well as primary growth. Song is a brief series of high thin “tsi-tzee” notes, and calls include various high chips and trills.