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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".

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).

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.

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.