Parrotfish color patterns are so different depending on age and gender that scientists once thought over 300 species existed. Now they know there are only about 60.
Photograph by Borut Furlan, Getty Images
Tent caterpillars defend themselves with numbers: if a predator finds them, it will be busy snacking on just a few caterpillars—leaving the rest free to escape.
Photograph by Luciano Candisani, Minden Pictures
A sea star’s tough skin makes the creature less appetizing to predators such as fish, sea turtles, and crabs.
Photograph by Narchuk.com, Getty Images
When it’s time to give birth, up to 60 female mouse-eared bats roost together. After the babies are born, some mothers go off to hunt while others stay behind to babysit.
Photograph by Ingo Arndt, Minden Pictures
The back, shoulders, wings, and tail of the Germain's peacock-pheasant, found in Vietnam and Cambodia, are covered in eye-shaped spots called ocelli.
Photograph by Mint Images, Frans Lanting, Getty Images
The shell of a radiated tortoise is packed with nerves so these reptiles can feel when they’re touched.
Photograph by Edwin Giesbers, NPL, Minden Pictures
Convergent lady beetles, found throughout the Americas, gather together and enter a hibernation-like state to survive harsh winter conditions.
Photograph by Ingo Arnd, Minden Pictures
Zebra stripes may help cool these mammals down. Why do scientists think that might be true? Zebras with more stripes live in hotter climates.
Photograph by Richard Du Toit, Minden Pictures
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