They are Antropods.You can clearly see here the 2 pairs of legs in each segment.Being curious with their slow crawling and curling movements,I took few shots. Check how they curl up when being disturbed.
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While crawling,
When being disturbed,
Rolled up to protect the legs.
the ability to comouflouge and pretending to be dead.
Ended up in a rounded curl,looks like an elegant bangle.