sentences:  They are sexually dimorphic with females being olive green while the males are orange to yellow on the underside with bright green, blue and purple on the head and neck.In 1760 the French zoologist Mathurin Jacques Brisson included a description of the orange-breasted sunbird in his "Ornithologie" based on a specimen collected from the Cape of Good Hope.He used the French name "Le petit grimpereau a longue queue du Cap de Bonne Espérance" and the Latin "Certhia Longicauda Minor Capitis Bonae Spei".