Weird and Wonderful Nature Tales of More Than 100 Unique Animals, Plants, and Phenomena (Ben Hoare)

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Page 39 of 194 37 Swimming snail Swimming snail Mysterious sea butterflies f lutter through the o cean. They are not insects, w hich can ’t surviv e in salt w ater , but a kind of sea snail. T heir muscular foot has split to become a pair of wings that f lap to push them forwa rd. B elow these is their spiral shell, w hich is see- through, a s if carve d from crystal. Page 77 of 194 75 B E A K S Black skimmer Each half of th e skimmer’s beak is a diffe rent le ngth. It flies low over wate r with…