The species’ name is technically accurate, but the male’s bright greenish-blue head is much more noticeable than his tail. Also note his red upper back and bright yellow underparts. Female is olive-yellow with paler underparts and a grayish head. Note the lack of a strongly contrasting pale rump patch as compared to female Mrs. Gould’s Sunbird. Green-tailed inhabits montane and hill forests and forest edge. Gives a sharp “zit!” and ringing twitters.