The natural world's knack for camouflage is undeniably cool, but see-through creatures take it to the next level. It's really quite profound – how to evade predators? Be literally invisible! Known as protective transparency, there are some 1,200 types of glasswing insects alone – the planthopper above, photographed by Andreas Kay in Ecuador, is just one of many.
And who knows, there may be many more and we just can't see them!
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(See more transparent animals here.)