Grey-bellied Tesia/Warbler (Chích đuôi cụt bụng xám, Tesia cyaniventer)
venter - Borrowing from Latin venter (“the belly; the womb; a swelling”).
New Latin cyani, from cyanus (specific epithet of centaurea cyanus), from Greek kyanos dark blue enamel.

The grey-bellied tesia (Tesia cyaniventer) is a species of warbler in the family Cettiidae.
Natural habitat is undergrowth of subtropical or tropical moist montane forest.