04/06/2026
The Olive-backed Sunbird (Cinnyris jugularis)—locally called tamsi—is a small, vibrant bird commonly found across the Philippines. Known for its metallic blue-black throat in males and bright yellow underparts, it thrives in gardens, mangroves, and even urban areas, often nesting near human dwellings.
🌿 Key Facts about the Olive-backed Sunbird
Scientific name: Cinnyris jugularis
Local name: Tamsi in the Philippines
Size: Small songbird, about 10–11 cm long; males weigh 6.7–11.9 g, females 6–10 g
Conservation status: Least Concern (IUCN)
🐦 Appearance
Male: Olive upperparts, metallic blue-black forehead, throat, and breast; bright yellow belly. Some subspecies in the Philippines show an orange chest band.
Female: More subdued—olive-green upper body with pale yellow underparts.
Distinctive feature: Long, curved bill adapted for nectar feeding.
🌸 Habitat & Behavior
Original habitat: Mangroves.
Adaptation: Now common in gardens, towns, and cities, often nesting in human dwellings.
Diet: Primarily nectar, but also eats insects and spiders—especially when feeding chicks.
Breeding: Builds hanging, purse-shaped nests from plant fibers, often suspended from branches or wires.
🌟 Why They Matter
Pollinators: Help fertilize flowers while feeding on nectar.
Urban wildlife: Their adaptability makes them a familiar sight in Philippine backyards.
Cultural presence: Their cheerful calls and bright plumage make them beloved among birdwatchers and locals alike.
