Page 22 - The Miracle of Migration in Animals
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THE MIRACLE OF MIGRATION IN ANIMALS
toward the food source. From the moment they emerge from pupa-
tion, they need the knowledge of how to be guided by the Sun and
make calculations based on the position of that moving heavenly
body. Without such knowledge, they could not survive, and their
species would die out.
Deserts feature vast tracts of sand with no distinguishing fea-
tures. The surface is so hot and dry that in most places it is impossible
for weeds or scrub to grow. Consequently there are no tracks or signs
for finding the way. Any rare footprints that may exist on the sand
can be erased in minutes due to the wind. Scent trails are scorched
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