This is an image of male yellow-breasted sunbird ( Nectarinia jugularis ) photographed in XTBG.

Nectarinia jugularis　 

Olive-backed sunbird is a small sized bird commonly found in many habitats, e‍specially in urban areas .It is the most abundant sunbird in Singapore ; other than Singapore, olive-backed sunbird can also be found in various areas ranging from tropical regions of Southeast China to Southeast Asia to Australia .Although olive-backed sunbird may look like a hummingbird,‍ they are in fact not closely related, and their resemblance is due to convergent evolution .Study has shown that olive-backed sunbird is phylogenetically closer to African sunbird species than all other Asian sunbird species, suggesting that some sunbirds might have migrated to Asia from Africa historically . (Source: http://taxo4254.wikispaces.com/Nectarinia+jugularis)