Wild Things: Life as We Know It

Cobras, sharks, lemurs, hermit crabs and more…

Common Thresher Shark (Franco Banfi / Photolibrary)

Shell Swap Meet

Hermit Crabs
(Mark Bowler / NPL / Minden Pictures (4))
Hermit crabs that have outgrown their snail shells synchronize their search for new housing. Researchers in Belize report when one crab finds an empty shell, it waits until a crowd forms, then the crabs “piggyback,” or climb onto one another’s shells, in a line from largest to smallest. Once one crab shimmies into the free shell, the others follow, like dominoes.

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