The Sumatran blue robin (''Myiomela sumatrana'') is an Old World flycatcher in the family

Muscicapidae The Old World flycatchers are a large family, the Muscicapidae, of small passerine birds restricted to the Old World (Europe, Africa and Asia), with the exception of several vagrants and two species, Bluethroat (''Luscinia svecica)'' and Northe ...

. It is endemic to the Indonesian island of Sumatra. It was formerly considered a subspecies of the

Javan blue robin The Javan blue robin (''Myiomela diana'') is a species of bird in the family Muscicapidae. It is endemic to the Indonesian island of Java. Its natural habitat is subtropical or tropical moist montane forest Montane ecosystems are found on t ...

(''M. diana''), with the two being united under the name Sunda robin, but a 2020 study found them to represent distinct species. ''M. sumatrana'' can be physically distinguished from ''M. diana'' by its much darker plumage in both males and females.

References

Sumatran blue robin Birds of Southeast Asia Sumatran blue robin {{Muscicapidae-stub