Apis andreniformis, or the black dwarf honey bee, is a relatively rare species of honey bee whose native habitat is the tropical and subtropical regions of Southeast Asia. A. andreniformis was the fifth honey bee species to be described of the seven known species of Apis. Wikipedia
Spotted at Choa Chu Kang – May 2021
The Plant is Tristaniopsis whiteana
Thanks Zestin Bees & Wasps of Singapore Soh for the ID.