The Asian fairy-bluebird is a blue-and-black bird seen alone or in pairs in the tree canopy and middle storey.
Males have a bright blue crown and red eyes; females have bluer, more subdued plumage than males.
The Asian Fairy-bluebird was included in a comparative study of rainforest birds across Southeast Asia. Researchers analyzed DNA from both modern and historical specimens and compared five species. They used ultraconserved genetic regions and recovered between 753 and 4,501 variable loci per species across the study.
For the Asian Fairy-bluebird, sampled populations in India and the peripheral Sunda Islands, including Java and/or Palawan, were highly divergent. The authors suggested that populations may have become largely isolated after colonizing these islands. The result links geography and dispersal history with genetic differences among rainforest bird populations.
An extinction-risk assessment has not been added yet.
The comparative study found highly divergent Asian Fairy-bluebird lineages in sampled birds from India and the peripheral Sunda Islands. The authors discussed limited later exchange between populations after island colonization.