They are ambush predators that patiently wait for their unaware victim to scurry past their lair before they strike and eat them as soon as they detect motion.
If threatened, they burrow themselves headfirst and back up plugging the hole with their abdomen. Their backside looks a lot like a coin and because of that they were often mistaken as coins by Chinese farmers who would come across them.
They also resemble Aztec sun stones. Their bite is low risk (non-toxic) so if you ever pick one up, and it bites you, you should be fine.
Pics : Nicky Bay
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