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The number of monarch butterflies at their wintering areas in Mexico dropped by 59% this year to the second lowest level since record keeping began, experts said Wednesday, blaming heat, drought ...
Monarch butterfly migration is the phenomenon, mainly across North America, where the subspecies Danaus plexippus plexippus migrates each autumn to overwintering sites on the West Coast of California or mountainous sites in Central Mexico. Other populations from around the world perform minor migrations or none at all.
In 1972 Brugger showed her a notice in a local newspaper written by Fred and Norah Urquhart, Canadian entomologists who had been studying the migration patterns of monarch butterflies since 1937. [3] They suspected the monarchs spent the winter in Mexico and were looking for volunteers to hunt for the butterflies there.
A new report shows a sharp decline in monarch butterflies migrating to Mexico as well as a loss of habitat in the forests they spend their winter each year.
Frederick Albert Urquhart CM (December 13, 1911 – November 3, 2002) was a Canadian zoologist and professor of zoology who studied the migration of monarch butterflies, Danaus plexippus L. [1] [2] Together with his wife, Norah Roden Urquhart CM, he identified their migration routes, discovered that the migration spans multiple generations of butterflies, and found their wintering place in ...
Monarch butterflies, with their striking black-and-orange coloring, have made a partial recovery in numbers of butterflies migrating from the U.S. and Canada to Mexico this year, after historic ...
The letter said, "Plummeting from a high of 1.1 billion monarch butterflies overwintering in central Mexico´s high-altitude oyamel fir forests in 1996 to a pitiful 33 million thinly scattered over seven sites during the current 2013–2014 season, the extraordinary monarch butterfly migratory phenomenon is now officially endangered.
During their annual migration to Mexico, monarch butterflies make a few pitstops. NBC News’ Isa Gutierrez spent the day with one organization at a pit stop in Cape May, New Jersey, that ensures ...