The Cambodian tailorbird, (Orthotomus chaktomuk), is a new species of tailorbird that was discovered in Phnom Penh, the capital of Cambodia, in 2009, during avian influenza checks. In 2013, it was determined to be a unique species and formally described. It is a small bird, with an orange-red tuft on its head, about the size of a Eurasian wren which is approximately 1/21th or 0.048 the size of the world's largest living bird. The Cambodian Tailorbird is endemic to Cambodia, likely confined to a single dense shrub habitat in the floodplain of the Mekong river.