Page 68 - Wonderful Creatures: Children! Have You Ever Thought ?
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WONDERFUL CREATURES
DID YOU KNOW
ABOUT LUMINESCENT
CREATURES?
Have you ever seen lights moving in trees at night? The source
of these lights, which may sometimes be so numerous that a tree
may be suffused with them all over, is fireflies. These are the best
known of luminescent living creatures. These animals, which
emit light and illuminate trees in the darkness of the night,
are among those that scientists have studied most. Soon
we will examine why, but first let's
see how these creatures use light.
Fireflies produce green-yellow lights in
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