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Latest Danaus Stories

Monarch Butterflies Won't Migrate North Unless They Can Chill Out First In Mexico
2013-02-22 10:09:45

April Flowers for redOrbit.com - Your Universe Online Millions of monarch butterflies from across the eastern U.S. begin a southward migration each fall to escape the frigid temperatures of the northern boundary of their range. They travel up to 2,000 miles to reach an overwintering site in a very specific grove of fir trees in central Mexico. A new study from the University of Massachusetts Medical School (UMass) suggests the butterflies require the exposure to coldness in the...

2012-09-19 23:01:20

Dorothy and Leo Keeler are wildlife photographers and founding members of the International League of Conservation Photographers. Their newest project offers creative incentives to help restore monarch butterflies across North America. The Milkweed for Monarchs Butterfly Garden Project is posted on Kickstarter.com and is designed to help restore monarchs by offering creative gifts to people who contribute to their butterfly garden project and are inspired to create Monarch Waystations of...

Monarch Butterflies Get A Break From Mexican Perils
2012-08-17 07:07:31

April Flowers for redOrbit.com - Your Universe Online Every fall, millions of Monarch butterflies make the 3,000-mile journey from Canada along the California coastline to central Mexico. Clouds of black, orange and white butterflies descend upon the oyamel fir trees in the Monarch Butterfly Biosphere Reserve. The Reserve is 200 square miles in the state of Michoacan, Mexico. One of the biggest obstacles that has faced the butterflies who winter in Mexico was deforestation by illegal...

2012-07-26 11:05:04

Test of captive butterflies shows association between pigment level and flight distance For monarch butterflies, redder wings are correlated with better flight performance, according to research published July 25 in the open access journal PLoS ONE. Previous work has shown that monarch coloring is intended to warn their predators about their bitter taste and toxicity, and that migratory butterflies are darker colored than non-migratory ones, suggesting an association between darker...

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2012-06-02 11:47:09

During the fall, hundreds of millions of monarch butterflies living in eastern North America fly up to 1,500 miles to the volcanic forests of Mexico to spend the winter, while monarchs west of the Rocky Mountains fly to the California coast. The phenomenon is both spectacular and mysterious: How do the insects learn these particular routes and why do they stick to them? A prevailing theory contends that eastern and western monarchs are genetically distinct, and that genetic...

Monarch Butterfly Population Continues To Decline
2012-03-23 06:32:38

A Texas A&M researcher has found evidence that the population of Monarch butterflies continues to shrink. Craig Wilson is a senior research associate in the Center for Mathematics and Science Education and a longtime butterfly enthusiast. He says, according to reports from the World Wildlife Fund, Mexico´s Michoacan State and a host of private donors, that the numbers of Monarch butterflies that cross the state of Texas will be dramatically reduced, by as much as 30%. These...

New Study Reveals That Butterflies Know Exactly Where To Go
2012-03-21 06:30:50

New research provides scientists with details about the migratory patterns of monarch butterflies and their endangered habitats. The Monarch butterfly (or Danaus plexippus) is a popular creature worldwide. Perhaps the most recognized and quintessential butterfly, the Monarch can be found as far south as Mexico and as far north as Canada. In fact, each year millions of these creatures begin their migration from Mexico to the great white north, breeding and laying eggs as they go. Most of...

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2010-10-12 08:00:00

Monarch butterflies appear to use medicinal plants to treat their offspring for disease, research by biologists at Emory University shows. Their findings were published online Oct. 6 in the journal Ecology Letters. "We have shown that some species of milkweed, the larva's food plants, can reduce parasite infection in the monarchs," says Jaap de Roode, the evolutionary biologist who led the study. "And we have also found that infected female butterflies prefer to lay their eggs on plants that...

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2010-07-27 07:31:37

Monarch butterflies "” renowned for their lengthy annual migration to and from Mexico "” complete an even more spectacular journey home than previously thought. New research from the University of Guelph reveals that some North American monarchs born in the Midwest and Great Lakes fly directly east over the Appalachians and settle along the eastern seaboard. Previously, scientists believed that the majority of monarchs migrated north directly from the Gulf coast. The study appears...

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2010-02-12 09:31:50

Traveling long distances spurs the evolution of larger and pointier wings A University of Georgia study has found that monarch butterflies that migrate long distances have evolved significantly larger and more elongated wings than their stationary cousins, differences that are consistent with traits known to enhance flight ability in other migratory species. As part of a National Science Foundation and UGA-funded study, researchers in the Warnell School of Forestry and Natural Resources and...


Latest Danaus Reference Libraries

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2005-08-25 10:17:06

The Monarch butterfly (Danaus plexippus) is a well-known North American butterfly with easily identifiable orange and black wings. The females have darker veins on their wings, and the males have a spot in the center of each hindwing from which pheromones are released. Monarchs are especially noted for their lengthy annual migration. They make massive southward migrations from August through October. A northward migration takes place in the spring. During these migrations the females...

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Word of the Day
tesla
  • The unit of magnetic flux density in the International System of Units, equal to the magnitude of the magnetic field vector necessary to produce a force of one newton on a charge of one coulomb moving perpendicular to the direction of the magnetic field vector with a velocity of one meter per second. It is equivalent to one weber per square meter.
This word is named for Nikola Tesla, the inventor, engineer, and futurist.