The Temminck's Sunbird (Aethopyga temminckii) is a species of sunbird. It is found in up to 1800 m altitude in Borneo, Sumatra, Malaysia, and south west Thailand in tropical or tropical moist lowland forests and subtropical or tropical moist montanes.
It is named after Dutch aristocrat and zoologist Coenraad Jacob Temminck, and has been considered conspecific with Scarlet Sunbird, Aethopyga mystacalis.
Temminck's Sunbird is 10 cm (female) -12.5 cm (male) long, . The longer-tailed male is mostly scarlet, except for a greyish belly, and yellow and purple bands between the back and tail. The female is drab olive, except for rufous fringes to the wing and tail feathers.