“Look deep into nature, and then you will understand everything better.” Albert Einstein
One of the surest first signs of fall in our area is the appearance of the Monarch Butterfly. The Monarch is my favorite butterfly. This is partially because the fall is my favorite season of the year but the other reason I am so fond of the Monarch is the amazing story of their migration. I learned about the Monarch many years ago but their story has always stuck with me.
The Monarch butterflies that we enjoy seeing this time of year will spend the winter months in Mexico, in the same trees their ancestors used for wintering a year earlier. The astonishing part of this is that these butterflies have never been in Mexico before but know the exact tree their great-grandparents used the prior year. You see, the Monarch that leaves Mexico in the spring will only live four to five weeks. It will fly into Texas, reproduce and die. That offspring will fly further north, reproduce and die. The third generation offspring will repeat the process again making it further north but still short of the final summer destination. The fourth generation Monarch will then fly to the northern U.S. or Canada and remain until fall. That generation, the super Monarchs, rather than living four or five weeks will live eight months and will leave Canada in late September or early October and then gradually make the long flight back to Mexico where it will spend winter, reproduce, and die. The cycle repeats each year as four new generations of butterfly take their place in the year long story of the Monarch. This butterfly is the male Monarch, distinguished by the black spot on the hind wings.
Monarch butterflies are poisonous if eaten since the caterpillar stage feeds on milkweed, a poisonous plant. Birds have long since learned not to eat the caterpillars or the butterflies themselves. Thus the Monarch has few predators to disturb their life cycles. Interestingly, another butterfly, the Viceroy, has nearly identical coloration and markings. The Viceroy is not poisonous since it does not feed on milkweed but birds tend to leave them alone, believing them to be their cousins, the Monarch. This adaptation is known as mimicry and is an effective strategy for protection. The Viceroy is a little smaller and has a single band across the mid portion of the hind wing. This is a sure indicator of which butterfly is which. The one in this photograph is the Monarch.
Next time you see a Monarch, count yourself lucky and remember their remarkable story.
About this photograph:
I shot this photograph on October 6, 2018.Here are the particulars:
Camera, Nikon D810
Lens, Nikor 70-200 F4
Focal length, 200 mm
Aperture, F4
ISO 100
Shutter speed 1/1600 second.