这种乌龟的头盖骨实在太大了，都无法缩回自己的壳当中。其濒临灭绝的原因主要是人们喜欢将它作为宠物或美食。

The big-headed turtle has a cranium so large inconvenience for the species, as it is so large it is unable to retract it into its shell for protection. Though it is widespread, being found in Cambodia, China, Laos, Myanmar, Vietnam and Thailand, the species is endangered - mainly due to popular demand for it as a pet or as a food. [Photo/Agencies]