The birds in Vietnam with brown upperparts could be:
1/ Gould's shortwing (Heteroxenicus stellatus)
2/ Blyth's paradise flycatcher (Terpsiphone affinis), also called the oriental paradise flycatcher
3/ Amur paradise flycatcher (Terpsiphone incei)
4/ Black paradise flycatcher (Terpsiphone atrocaudata), also known as the Japanese paradise flycatcher
