Ashy Tailorbird 
(Chích bông xám tro, Orthotomus ruficeps)

The ashy tailorbird (Orthotomus ruficeps) is a species of bird formerly placed in the "Old World warbler" assemblage, it but now placed in the family Cisticolidae.
The bird is found in Brunei, Indonesia, Malaysia, Myanmar, the Philippines, Singapore, and Thailand, Vietnam.

The name Cisticoladae from Cisticola, which is from Ancient Greek kisthos, "rock-rose", and Latin colere, "to dwell". ... cisticola).
Orthotomus: from the Ancient Greek orthotomeō, meaning 'to cut straight'.
ruficeps Latin rufus red, ruddy; -ceps -headed.