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Photo: JJ Harrison · CC BY-SA 3.0 (May be cropped or resized)
Stachyris thoracica
Habitat
Subtropical or tropical moist lowland and montane forest
Range
Bali and Java (as given in the account used)
The white-bibbed babbler is a babbler of the family Timaliidae. The account used here places it on Bali and Java, in subtropical or tropical moist lowland and montane forest, so its listing for Sumatra should be checked (Wikipedia, general species account).