Thailand Thungyai-Huai Kha Khaeng Wildlife Sanctuaries
The Thungyai-Huai Kha Khaeng Wildlife Sanctuaries comprises two contiguous wildlife sanctuaries: Thung Yai and Huai Kha Khaeng, alongside the western international border with Myanmar, 300 km north-west of Bangkok. The terrain in Huai Kha Khaeng is generally hilly with many permanent and seasonal streams. The highest peak lies in the extreme north of the sanctuary. Valleys are interspersed with small lowland plains. In Thung Yai the topography is more dissected with a network of many permanent rivers and streams dividing the area onto valleys and lowland plains. A distinguishing feature is a large central grassland plain, from which the Sanctuary takes the name of Thung Yai ('big field'). Within the catchment area are four important rivers, one of which flows through Burma to the Andaman Sea.

Continent: Asia
Country: Thailand
Category: Natural
Criterion: (VII)(IX) (X)
Date of Inscription: 1991
Huai Kha Khaeng Wildlife
A physical feature that is important for wildlife is the presence of mineral licks. These occur throughout the sanctuary as either wet or dry, and most appear to be located on, or around, granite intrusions in areas with red-yellow podzolic soil and may be associated with the massive faults or lineaments in the intensely folded geomorphology of this area. Small lakes, ponds and swampy areas occur, some being seasonal whereas others are perennial; these are important wildlife habitats; limestone sinkholes are found.
Five types of forest can be distinguished: the highest slopes are covered with hill evergreen forest, whereas slopes above 600 m generally support dry semi-evergreen forest. The rest of the sanctuary supports mixed deciduous and bamboo forest, and dry dipterocarp forest in areas with poor or shallow soil. Along some rivers and streams, evergreen gallery forest occurs.