MONARCH MIGRATION MYSTERY

by Gwen Austin Copyright 1998

How do you know where to go when winter’s near? You, with your pin-head brain, who have never been there before, how do you know it’s off to California or Mexico you must go? Scientists know autumnal equinox triggers your departure, but what makes you go where you go? And how do you know how to get there? Weighing less than one half ounce, how can your body fat sustain flight across all those miles and through the winter? As you cling to a tree 80 miles from Mexico City, have you thoughts of the morrow when you must return to your place of origin? You, and your myriads look like you’d smother each other, as you wile away winter. If you choose your tree well, in correct temperature range, your body fat will last through hibernation’s fast. If you get too hot, you flutter your wings, or you might flee to a shady spot, or cooler heights of designer clouds with up-flipped curls. Wherever you go, your gossamer gathering shimmers in golden glow like leaves of quaking aspen. Beware predators abound in your wintering ground. Birds generally leave you alone, for they have learned your black-webbed bright orange wings POISON. But deer mice surely must sing at their butterfly buffet, dining on fat-enriched bodies, casting aside each plucked wing. On vernal equinox, it’s time to arise to the sky and fly back to your home place, laying eggs along the way for the next generation of monarch butterfly. How do THEY know where to go to escape winter cold and snow?

GREAT PHOTOS OF MONARCHS

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