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Baikal bush warbler (Locustella davidi), 
also known as Baikal grasshopper-warbler or David's bush warbler

The Baikal bush warbler (Locustella davidi), also known as Baikal grasshopper-warbler or David's bush warbler, is a migratory species of Old World warbler in the family Locustellidae.

The bird breeds from the southern part of the Russian Far East to northeast China and North Korea. It winters from southern China south to northern Thailand.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".

Brown bush warbler 
(Chích bụi rậm nâu, Locustella luteoventris )
Formerly placed in the "Old World warbler" assemblage as Bradypterus luteoventrus, it is now placed in the newly recognized family Locustellidae.

The brown bush warbler (Locustella luteoventris) is a songbird species of the family Locustellidae.
The bird is found in Bangladesh, Bhutan, China, Hong Kong, India, Myanmar, Nepal, Thailand, and Vietnam.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".
luteoventris Latin luteus saffron-yellow; venter, ventris belly.

Chinese Bush-Warbler 
(Chích ngực hung, Locustella tacsanowskia)

The Chinese bush warbler (Locustella tacsanowskia) is an Old World warbler in the family Locustellidae.
The bird breeds in the East Palearctic (East Siberia to Tibet and South China) and winters to Northeast India, Yunnan and Southeast Asia.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".

Helopsaltes is a genus of passerine birds in the grassbird family Locustellidae.

Pallas's grasshopper warbler (Helopsaltes certhiola), also known as the rusty-rumped warbler, is an Old World warbler in the grass warbler genus Helopsaltes, the family Locustellidae.

1/ Pallas's grasshopper warbler (Chích đầm lầy lớn, Helopsaltes certhiola)

Locustellidae, Locustella is from Latin and is a diminutive of locusta, "grasshopper".
The genus name Helopsaltes combines the Ancient Greek helos meaning "marshy ground" and psaltis "a chanter".

The lanceolated warbler 
(Chích đầm lầy nhỏ, Locustella lanceolata)

The lanceolated warbler (Locustella lanceolata) is a species of Old World warbler in the grass warbler genus Locustella.
The bird breeds from northeast European Russia across the Palearctic to northern Hokkaidō, Japan. 
It is migratory, wintering in Southeast Asia.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".
The specific lanceolata is Latin for "spear-shaped" and refers to the streaks on the breast.

The grass warblers (Grasshopper Warbler) are small passerine birds belonging to the genus Locustella, now considered the northernmost representatives of a largely Gondwanan family, the Locustellidae.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".

1/ The lanceolated warbler (Chích đầm lầy nhỏ, Locustella lanceolata)
2/ Chinese Bush-Warbler (Chích ngực hung, Locustella tacsanowskia)
3/ Brown bush warbler (Chích bụi rậm nâu, Locustella luteoventris )
Formerly placed in the "Old World warbler" assemblage as Bradypterus luteoventrus, it is now placed in the newly recognized family Locustellidae.

4/ Russet bush warbler (Chích nâu đỏ, Locustella mandelli)
The scientific name commemorates the Italian naturalist Louis Mandelli.

5/ Dalat bush warbler (Locustella idonea)
Chích nâu đỏ Đà Lạt
also known as Annam Grasshopper-Warbler
Some authorities still consider Dalat bush warbler (Locustella idonea) conspecific with the russet bush warbler. 

6/ Spotted bush warbler (Chích họng vạch, Locustella thoracica)

7/ Baikal bush warbler (Locustella davidi), 
also known as Baikal grasshopper-warbler or David's bush warbler

Russet bush warbler 
(Chích nâu đỏ, Locustella mandelli)

The russet bush warbler (Locustella mandelli) is a songbird species placed in the newly recognized family Locustellidae.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".
The scientific name commemorates the Italian naturalist Louis Mandelli.

Spotted bush warbler 
(Chích họng vạch, Locustella thoracica)

The spotted bush warbler (Locustella thoracica) is a species of Old World warbler in the family Locustellidae.
The bird is found in the the countries of Bangladesh, Bhutan, China, India, Myanmar and Nepal.

The genus name Locustella is from Latin and is a diminutive of locusta, "grasshopper".
thoracica: Latin thoracicus pectoral, of the chest (Greek thorakikos suffering in the chest, thorax breast).