After
raising hundreds of monarch caterpillars and netting almost as many wild
butterflies in late September we made our annual trek to the northern end of
Cape Cod. There we spend most of our time combing the beach for useful stuff: rope, buoys, animal skulls,
fishing gear and clothing. This usually accumulates above the high tide levels
and we rarely cover wave edges.
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Typical Sight After a Wave Recedes |
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Damaged Monarch |
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Limp Monarch Butterfly Left High on
the Beach
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Reviving Monarch Butterfly
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Because we were in the peak period for Monarch
migration, I spent a few hours checking what the waves were leaving behind as
high tide receded toward low tide. Water temperatures were much cooler than the
air and waves left immobile butterflies on the wet sand. After
counting a few dozen I began picking them up and noticed most were very much
alive! Holding them in cupped hands and breathing on them made them active but
not able to fly.
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A Monarch Butterfly Trying to Open
Wings Cemented Together by Salt Water
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Three Reviving Monarch Butterflies
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Because I could only wear a half dozen at a
time, I periodically placed groups on flowers or tall grass, the only available
vegetation. They spread their wings to catch sunlight but took their time
trying to fly. The next day most of three dozen had flown away and only a few
were no longer alive.
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Wave Beaten Monarchs Drying Out Their
Wings on Goldenrod
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Monarchs Warming Up on Grass
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The shortest distance between parts of Maine and
New Hampshire and Mexico is over ocean. They probably want to rest at night and
land but have no experience with water. They are very light and float but it's probably impossible
to take off again. Wind and waves push them to shore but breakers and advancing
waves push them up the beach and damage them. We found many missing parts. But
the lucky ones came to shore when waves were receding and these were cold but
in good shape. With help some may make it to Mexico but without warming and
transport to dry vegetation the next high tide or shore birds would pummel them. A
three hour snapshot of a quarter mile of beach yielded three dozen healthy
Monarch butterflies. How many folk would spend an hour to rescue a dozen?