Migration is underway. We’re beginning to see more of the monarch butterflies (Danaus plexippus) magically drifting southward on their August journey to Mexico. One of the few insects able to make the trans-Atlantic crossing, the East Coast monarchs winter in Mexico, then make the amazing return journey back each spring.
Interestingly, monarchs only live a few short weeks and those born earlier in the summer do not make the southern journey. Those born at this time of the year, usually the 3rd or 4th generation of monarchs, are the ones to make that southern migration and survive the winter. It is amazing how instinct kicks in as a different butterfly makes the arduous journey each year, traveling up to 30 miles a day.
Illegal logging in Mexico has reduced the winter habitat for the insect however the Mexican government has begun to crack down on this problem. What can you do to help the monarch butterfly? Plant milkweed, folks. It’s the only plant the caterpillar can eat. Due to toxins absorbed from the milkweed plant as a caterpillar, the monarch does not have many predators. The bright colors the butterfly wears is an advertisement that says, “I’m poison.” The v has evolved to mimic the color and pattern of the monarch as a defense although it is non-toxic.
If you spot a monarch butterfly fluttering by, there are websites that would like to keep track of your sightings. I report my sightings to Monarch Butterfly Journey North, a great website that provides migration updates with maps and provides excellent information on the life of this special insect.
Ann Hohenberger, The Garden Club of Gloucester