Monarch Butterflies in Crisis

Monarch Butterfly Overwintering Graph Journey NorthEach winter, since I began photographing the Monarchs in 2006, I compare this graph from Journey North to the number of butterflies observed on Cape Ann. As you can clearly see, this is the worst year on record, which corresponds to the near complete lack of Monarchs in our region this past summer.

Monarchs Gloucester 2012 �Kim Smith
Monarch Butterflies Eastern Point Gloucester

Many thanks to Kathy Chapman and our GMG Readers for forwarding the following New York Times update about the shrinking Monarch Butterfly popluation.

By Michael Wines

January 29, 2014

Faltering under extreme weather and vanishing habitats, the yearly winter migration of monarch butterflies to a handful of forested Mexican mountains dwindled precipitously in December, continuing what scientists said was an increasingly alarming decline.

The migrating population has become so small — perhaps 35 million, experts guess — that the prospects of its rebounding to levels seen even five years ago are diminishing. At worst, scientists said, a migration widely called one of the world’s great natural spectacles is in danger of effectively vanishing.

The Mexican government and the World Wildlife Fund said at a news conference on Wednesday that the span of forest inhabited by the overwintering monarchs shrank last month to a bare 1.65 acres — the equivalent of about one and a quarter football fields. Not only was that a record low, but it was just 56 percent of last year’s total, which was itself a record low.

At their peak in 1996, the monarchs occupied nearly 45 acres of forest.

The acreage covered by monarchs, which has been surveyed annually since 1993, is a rough proxy for the actual number of butterflies that survive the arduous migration to and from the mountains.

Karen S. Oberhauser, a conservation biologist at the University of Minnesota who has studied monarchs for decades, called the latest estimate shocking.

“This is the third straight year of steep declines, which I think is really scary,” she said. “This phenomenon — both the phenomenon of their migration and the phenomenon of so many individuals doing it — that’s at risk.”

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Setting the Table for a Regal Butterfly Comeback, With Milkweed

Monarch Caterpillar Milkweed ©Kim Smith 2013Monarch Caterpillar Eating Common Milkweed (Asclepias syriaca) Foliage

Thank you GMG readers and Monarch Butterfly friends for forwarding the following article from the NY Times!

By Michael Wines

Published December 20th, 2013

CEDAR FALLS, Iowa — Bounding out of a silver Ford pickup into the single-digit wind-flogged flatness that is Iowa in December, Laura Jackson strode to a thicket of desiccated sticks and plucked a paisley-shaped prize.

It was a pod that, after a gentle squeeze, burst with chocolate brown buttons: seeds of milkweed, the favored — indeed, the only — food of the monarch butterfly caterpillar.

Once wild and common, milkweed has diminished as cropland expansion has drastically cut grasslands and conservation lands. Diminished too is the iconic monarch.

Dr. Jackson, a University of Northern Iowa biologist and director of its Tallgrass Prairie Center, is part of a growing effort to rescue the monarch. Her prairie center not only grows milkweed seeds for the state’s natural resources department, which spreads them in parks and other government lands, but has helped seed thousands of acres statewide with milkweed and other native plants in a broader effort to revive the flora and fauna that once blanketed more than four-fifths of the state.

Monarch Caterpillar milkweed -2 © Kim Smith 2012Monarch caterpillar hanging from a Marsh Milkweed (Asclepias incarnata) leaf rib, in the characteristic J-shape, readying to pupate.

Nationwide, organizations are working to increase the monarchs’ flagging numbers. At the University of Minnesota, a coalition of nonprofits and government agencies called Monarch Joint Venture is funding research and conservation efforts. At the University of Kansas, Monarch Watch has enlisted supporters to create nearly 7,450 so-called way stations, milkweed-rich backyards and other feeding and breeding spots along migration routes on the East and West Coasts and the Midwest.

But it remains an uphill struggle. The number of monarchs that completed the largest and most arduous migration this fall, from the northern United States and Canada to a mountainside forest in Mexico, dropped precipitously, apparently to the lowest level yet recorded. In 2010 at the University of Northern Iowa, a summertime count in some 100 acres of prairie grasses and flowers turned up 176 monarchs; this year, there were 11.

Read the story here