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Black-throated laughingthrush 
(Khướu bạc má, Pterorhinus chinensis)
earlier placed in the genus Garrulax.

The black-throated laughingthrush (Pterorhinus chinensis) is a species of bird in the family Leiothrichidae.
The bird is found in Cambodia, China, Laos, Myanmar, Thailand, and Vietnam. 

Compare:

• Black-throated laughingthrush (Khướu bạc má, Pterorhinus chinensis): black hair stretches along the throat to the breast.
• White-Cheeked Laughingthrush (Khướu đầu xám, Pterorhinus vassali): Black hair does not stretch into the breast.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus Pterorhinus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".

Chestnut-capped laughingthrush 
(Pterorhinus mitratus), also known as the spectacled laughingthrush

The chestnut-capped laughingthrush (Pterorhinus mitratus), also known as the spectacled laughingthrush, is a species of bird in the family Leiothrichidae.
The bird is found in Sumatra (Indonesia) and the Thai-Malay Peninsula.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
mitrata, mitratus Latin mitratus crowned, mitred (mitra head-dress; Greek mitra cap, head-dress).

Greater necklaced laughingthrush 
(Pterorhinus pectoralis)
 formerly placed in the genus Garrulax.

The greater necklaced laughingthrush (Pterorhinus pectoralis) is a species of passerine bird in the family Leiothrichidae.
The bird is found in Bangladesh, Bhutan, China, India, Laos, Myanmar, Nepal, Thailand and Vietnam.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
pectoralis Latin pectoralis of the breast, or pectoral (from Latin pectus breast).

Masked laughingthrush 
(Bò chao, Liếu điếu, Pterorhinus perspicillatus)

The masked laughingthrush (Pterorhinus perspicillatus) is a species of laughingthrush found in China and Vietnam.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
The specific epithet perspicillatus is Latin meaning "spectacled".

Pterorhinus is a genus of passerine birds in the laughingthrush family Leiothrichidae.
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
Earlier the species of this genus were placed in the genus Garrulax.

1/ Masked laughingthrush (Bò chao, Liếu điếu, Pterorhinus perspicillatus)
2/ Chestnut-capped laughingthrush (Pterorhinus mitratus), also known as the spectacled laughingthrush
3/ White-browed laughingthrush (Bò chiêu, Pterorhinus sannio) 

4/ Black-throated laughingthrush (Khướu bạc má, Pterorhinus chinensis)
earlier placed in the genus Garrulax.

5/ Wayanad laughingthrush (Khướu bụng vằn, Pterorhinus delesserti)
The specific epithet was chosen to honour the French naturalist Adolphe Delessert who had collected specimens from near Kotagiri in the state of Tamil Nadu, India.
Once placed in Crateropus, Dryonastes or Garrulax, Ianthocincla.

Some resemblance to the rufous-vented laughingthrush (Pterorhinus gularis) of northeastern India which has a yellow throat. 

Some older treatments considered lumped delesserti with gularis.

 The ranges of delesserti and gularis are widely disjunct but museum specimens can be told apart by the pale lower mandible of delesserti unlike the all dark bill of gularis. 
The tail is uniformly coloured and is darker than the back in delesserti while that of gularis is pale with rufous outer tail feathers. 
The chin is yellow in gularis while white in delesserti. 

6/ White-cheeked laughingthrush (Khướu đầu xám, Pterorhinus vassali)
formerly placed in the genus Garrulax.

7/ White-throated laughingthrush (Khướu họng vàng, Pterorhinus albogularis) 
 formerly placed in the genus Garrulax.

8/ Greater necklaced laughingthrush (Pterorhinus pectoralis)

 formerly placed in the genus Garrulax.

9/ Rufous-vented laughingthrush (Pterorhinus gularis)

Rufous-vented laughingthrush 
(Pterorhinus gularis)

The rufous-vented laughingthrush (Pterorhinus gularis) is a species of bird in the family Leiothrichidae. 
The bird is found in Bangladesh, Bhutan, India, Laos, Myanmar, and Vietnam.

Pterorhinus is a genus of passerine birds in the laughingthrush family Leiothrichidae.
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
Earlier the species of this genus were placed in the genus Garrulax.
Latin gula throat; gularis: -throated; 

Wayanad laughingthrush 
(Khướu bụng vằn, Pterorhinus delesserti)
Once placed in Crateropus, Dryonastes or Garrulax, Ianthocincla.

The Wayanad laughingthrush (Pterorhinus delesserti) is a species of laughingthrush in the family Leiothrichidae. It is endemic to the Western Ghats south of Goa in India.

Some resemblance to the rufous-vented laughingthrush (Pterorhinus gularis) of northeastern India which has a yellow throat. 
Some older treatments considered lumped delesserti with gularis.

The ranges of delesserti and gularis are widely disjunct but museum specimens can be told apart by the pale lower mandible of delesserti unlike the all dark bill of gularis. 
The tail is uniformly coloured and is darker than the back in delesserti while that of gularis is pale with rufous outer tail feathers. 
The chin is yellow in gularis while white in delesserti. 

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
The specific epithet was chosen to honour the French naturalist Adolphe Delessert who had collected specimens from near Kotagiri in the state of Tamil Nadu, India.

White-browed laughingthrush 
(Bò chiêu, Pterorhinus sannio) 

The white-browed laughingthrush (Pterorhinus sannio) is a bird in the family Leiothrichidae. 
The bird is found in China, Hong Kong, India, Laos, Myanmar, Thailand, and Vietnam.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
sannio Latin for sannio jester, buffoon.

White-Cheeked Laughingthrush 
(Khướu đầu xám, Pterorhinus vassali)
formerly placed in the genus Garrulax.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus Pterorhinus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".

The white-cheeked laughingthrush is a species of bird in the family Leiothrichidae.

Traits: white-cheeked, gray crown and nape, black lores and black hair at the base of the bill.

White-throated laughingthrush 
(Khướu họng vàng, Pterorhinus albogularis) 
 formerly placed in the genus Garrulax.

The white-throated laughingthrush (Pterorhinus albogularis) is a species of passerine bird in the family Leiothrichidae.
The bird is found mainly in the northern regions of the Indian subcontinent, primarily the Himalayas, and some adjoining and disjunct areas: Afghanistan, Bhutan, India, Myanmar, Nepal, Tibet and Vietnam.

Leiothrix Leiothrichidae Ancient Greek leios meaning "smooth" and thrix meaning "hair".
The name of the genus Pterorhinus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
The name of the genus combines the Ancient Greek pteron meaning "feather" with rhinos meaning "nostrils".
Earlier the species of this genus were placed in the genus Garrulax.
albogularis: Latin for white-throated.