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 north ...

. It is endemic to the Indonesian island of

Sumatra Sumatra () is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the list of islands by area, sixth-largest island in the world at 482,286.55 km2 (182,812 mi. ...

. 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 forests. The Sumatran blue robin (''Myiomela ...

(''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

Myiomela Birds of Southeast Asia Birds described in 1918 {{Muscicapidae-stub