When I'm not chasing the history of this land, I
like to take a step back and enjoy the natural beauty of my
surroundings. Nature can be as diverse and unique as any other
element that I might choose to write about. This particular day
in November, we happened to come upon one of those natural
phenomenon which requires you to be in the right place at the
right time. The place was Pismo Beach, California, and the event
was the annual migration of the wonderfully colorful Monarch
butterflies. These creatures are the only insects that migrate.
Having been found as far north as Canada, these delightful
lepidopteras form into two large groups and fly south for the
winter
much as birds do. The group east of the Rockies,
flies thousands of miles into the mountains of Mexico. The
Western group flies down the coast of California, settling in a
few known places to wait out the winter before returning to the
North for the next season. Unfortunately, many of the winter
habitats are on private lands and, as such, are being destroyed
in the name of progress. However one such wintering spot is a
State Park and is protected, and here the creatures thrive,
darting here and there to the amazement and delight of audiences
below. In order to chart the migration of these beautiful
creatures the State has students who come in, collect some of the butterflies
and mark them with tiny numbers on their wings. That way, when
they are found, it is possible to discover where their migration
has taken them. Contrary to what many of us have been told as
small children, handling a butterfly will not hamper its ability
to fly.
It all starts with the laying of a single shiny egg on the
underside of a milkweed leaf. So tiny that it often takes a
magnifying glass just to find them, these eggs will hatch in 4 or
5 days, producing a vivacious little caterpillar ready to devour
just about everything in its path. And everything in its path is
usually the highly alkaline milkweed leaf. This, it is believed,
will give the caterpillar a bitter flavor and as such is often
avoided as a food source by most predators.
Over
the next 10 to 15 days, the constantly changing little larva will
increase in size, an amazing 2,700 times, splitting out of his
outer skin (molting) 4 to 5 times. During this period, the larva
will pass through a series of color changes of its orange, black
and white rings. In the final stages, horns will be added to its
head and tail. After the 4th or 5th molting, a strange thing
happens to the monarch. The larva begins to spin a kind of button
of silk-like material with its mouth. Simultaneously a hook
called a "cremaster" has appeared at the end of its
tail. With the button securely attached to a sturdy limb the
larva stabs the hook into the button and then relaxes, hanging
upside down from the limb. Shortly the larva will form a J and
begins to change.
HOME PAGE
Next >>>>>