A juvenile Crab-eating Macaque in Prachuap Khirikhan province. It has a long tail, with a length that equals up to ten centimeters more the size of its head and body together, and is therefore also known as a Long-tailed Macaque. In Thai it is called ling sahaem.

Its coat is brown with some grey and the fur on its head is short and sticks upward. It is a social animal that lives in large groups and can be found all over Thailand. It feeds on plants, insects and crabs, hence its English common name. This one was spotted in Phetchaburi.