The Thai diversa form has a pale-brown forehead and throat and a rich chestnut breast. It has been recorded in hill and montane evergreen forest at Khao Soi Dao.
In the Thai diversa form, the forehead, throat and sides of the neck are pale brown, the breast is rich chestnut, and the pale-brown mantle has narrow black feather tips rather than bold bars.
Siamese Partridges inhabit evergreen forest in eastern Thailand. About 29 centimetres long, they have a black line through the eye region and a bold black-and-white pattern on the flanks.
An expedition visited Khao Soi Dao Wildlife Sanctuary on 5–9 December 2000. Observers spent three days in hill evergreen forest above 900 metres and repeatedly heard at least one bird at 1480 metres near the highest peak. The specialist-group report appeared in 2001.
A bird was seen only when captured. Considered possibly female from its plumage, it was photographed and released. Sightings were scarce and calls infrequent during the visit; the call records and photograph documented its occurrence on the mountain at that time.
An extinction-risk assessment has not been added yet.
Thailand’s administrative account identifies human persecution and hunting pressure as threats to the birds recorded at Khao Sabap and Khao Soi Dao in Chanthaburi. The 2001 field report also highlighted the need for research and conservation. Priorities include retaining evergreen forest, protecting birds from capture and hunting, and investigating occurrence with attention to periods of infrequent calling.