[Pollinator] Science Friday Picture of the Week: Monarch Butterflies

[Matthew Shepherd]

http://sciencefriday.com/images/v1/header-logo-2.png

 

 

http://sciencefriday.com/blogs/11/27/2013/picture-of-the-week-monarch-butter
flies.html?series=31

Nov. 27, 2013

Picture of the Week: Monarch Butterflies
<http://sciencefriday.com/blogs/11/27/2013/picture-of-the-week-monarch-butte
rflies.html?series=31&interest=&audience=&author=> 

by Becky Fogel <http://sciencefriday.com/blogs/?author=230> 

http://sciencefriday.com/images/data/IMAGE/photo/000/011/11399-1.JPG

Photo by Edward Rooks

 

 

Delicate, muted brown leaves shroud the bowed branches of a tree on the
California coast. At least, that's what they look like. On second glance, a
few bursts of deep orange reveal the true identity of this false
foliage-monarch butterflies. Wildlife artist Edward Rooks
<http://www.rooksart.com/>  captured the iconic insects in this photograph
while they wintered at Lighthouse Field State Beach in Santa Cruz in 2007.

 

Every Thanksgiving since 1997, the Xerces Society <http://www.xerces.org/>
-a nonprofit organization focused on invertebrate conservation-has been
tracking the number of western monarchs at dozens of sites
<http://www.xerces.org/wp-content/uploads/2011/04/WMTC-Data-1997-2012-Update
d-1-NOV-2013.pdf>  throughout California, including the Santa Cruz habitat.
Xerces Society executive director Scott Hoffman Black says that the weeks
surrounding Turkey Day are primetime for monarch counts because the insects
"have usually coalesced into an overwintering site," forming large clusters
like the one seen in Rooks's photograph.

 

Rooks considers monarchs among the "few spectacles that really can be used
to grab the public's attention" and inspire them to love nature. A little
TLC (tender, loving, conservation) may indeed be needed to revive western
monarchs
<http://www.xerces.org/wp-content/uploads/2011/03/western-monarchs-factsheet
.pdf> , a geographically distinct population from the butterflies that
migrate east of the Rockies, between Canada and Mexico. Xerces Society data,
collected by a cadre of committed volunteers and citizen scientists, have
shown an 80 percent decline in the monarch population at the sites that they
monitor. The year Rooks snapped this photo, 5,700 western monarchs-which
travel from states including Oregon and Nevada to California each fall-were
nestled among the eucalyptus and cypress trees at Lighthouse Field. Ten
years earlier, an estimated 70,000 butterflies congregated near this stretch
of sea, according to Xerces data.

 

Lack in milkweed <http://www.xerces.org/milkweed/> -a plant on which
monarchs lay eggs-and the expansion of real estate development into
overwintering locations could be responsible for the precipitous decline,
says Hoffman Black, although "climate is the overarching issue," he adds.
But Hoffman Black tries to remain optimistic. "We're always hopeful to see
more monarchs at these sites and not less," he says. And soon enough, the
results from The Xerces Society's Western Monarch Thanksgiving Count
<http://www.xerces.org/butterfly-conservation/western-monarch-thanksgiving-c
ount/> -which runs from November 16th to December 8th this year-will help
determine if we have a few more monarchs to be thankful for.

 

For more on the status of both the western and eastern populations of
monarch butterflies, see the North American Monarch Conservation Plan
<http://www.mlmp.org/Resources/pdf/5431_Monarch_en.pdf> .

 

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