About Glass frogs:
Glass frogs live in the American tropics and are nocturnal amphibians that spend their days sleeping upside
down on translucent leaves that match the colour of
their backs — a common camouflage tactic.
Their translucent skin and muscle allow their bones and organs
to be visible.
How Glassfrog become transparent:
● Resting glass frogs increase transparency two to
threefold by removing nearly 90 per cent of their
red blood cells from circulation and packing them
within their liver, which contains reflective guanine crystals.
● Whenever the frogs need to become active again,
they bring the red blood cells back into the blood,
which gives the frogs the ability to move around
-- at which point, light absorption from these cells
breaks transparency.
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