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Latest Danaus Stories

Monarch Butterflies Rely In Part On Magnetic Compass For Navigation
2014-06-25 07:52:07

April Flowers for redOrbit.com - Your Universe Online Mass migrations have puzzled scientists for decades, and perhaps none more so than the North American monarch butterfly. Each fall, millions of the beautiful orange and black winged insects begin their journey from the eastern US and Canada. They travel over 2,000 miles to winter in specific groves of fir trees in the Michoacan Mountains in central Mexico, where they crowd together so densely that the air is filled with butterflies,...

Monarch Butterflies Threatened Due To North American Habitat Loss
2014-06-05 11:57:41

Brett Smith for redOrbit.com - Your Universe Online Populations of monarch butterflies are projected to decline in eastern North America and a new study published today in the Journal of Animal Ecology concluded that habitat loss in North America would be to blame. "Our work provides the first evidence that monarch butterfly numbers in eastern North America are most sensitive to changes in the availability of milkweed on breeding grounds, particularly in the Corn Belt region of the...

Skipping Meals May Affect Butterfly Wing Size And Coloration
2014-04-04 14:22:08

PLOS Two days without food for larvae may contribute to pale coloration, smaller butterfly wings High food stress may impact wing size and coloration—both indicators of migratory success—in monarch butterflies, according to results published April 2, 2014, in the open access journal PLOS ONE by Haley Johnson from University of Jamestown and colleagues. Monarch butterflies migrate long distances according to the seasons every year. Because this requires so much energy, they...

Monarch Butterflies In Peril
2014-01-30 05:15:52

[ Watch the Video: Where Have All The Monarchs Gone? ] April Flowers for redOrbit.com - Your Universe Online A new report, based on a December 2013 survey of Mexico's Monarch Butterfly Biosphere Reserve, claims that migrating monarch butterflies are in "grave danger." The butterfly colonies currently occupy the smallest area since records began in 1993. The butterflies spend their winter hibernating in the forest of the reserve. In December 2013, the butterflies only occupied 1.65...

Monarch Butterfly Grassroots Conservation
2013-10-29 05:31:15

redOrbit Staff & Wire Reports - Your Universe Online US citizens love their monarch butterflies – so much so that they are apparently willing to contribute at least $4.78 billion dollars to conservation organizations working to protect the declining species, according to research published Monday in the journal Conservation Letters. As part of the study, experts from the US Geological Survey (USGS), Colorado State University, the University of Minnesota, and others conducted a...

Monarch Population Declining In Mexican Forests
2013-08-26 05:14:06

redOrbit Staff & Wire Reports - Your Universe Online Experts are concerned that monarch butterflies, famous for their nearly 3,000 mile migration to Mexico and coastal California during the late summer/early fall months, could be drastically decreasing in numbers. According to James A. Foley of Nature World News, conservation groups are reporting that the number of monarch butterflies in the Mexican forests where they hibernate over the winter were at their lowest point in two...

Monarch Butterfly Migration Tracked
2013-08-07 13:18:09

Brett Smith for redOrbit.com - Your Universe Online Monarch butterflies are known for their annual migration that spans several generations and can extend from Canada to Mexico. Tracking these majestic butterflies across thousands of miles and several generations has proven difficult for lepidopterologists, but new research published in the Proceedings of the Royal Society B has done just that and revealed new details about the majestic insect's life cycle in the process. Before the...

Monarch Butterflies Rely On Landmarks In Order To Find Their Way
2013-04-09 12:37:42

Alan McStravick for redOrbit.com - Your Universe Online In an article written for redOrbit last month by Michael Harper, the overall population of the Monarch butterfly was predicted to be significantly lower than in years past. It is believed this decline is due to the combination of expanded farmlands and the steady increase in temperature in their migratory corridor. A new study, led by researchers from the University of Guelph, focused on the migratory corridor followed by these...

Expect To See Fewer Monarch Butterflies This Spring
2013-03-14 18:12:32

Michael Harper for redOrbit.com — Your Universe Online Every year, hoards of Monarch butterflies begin their epic journey from Mexico through the hills of Texas to all points north, sometimes as far as Canada. Unfortunately, there will be fewer butterflies to take this journey during the coming months. It´s a trend that has been ongoing for about seven years or more and, according to Omar Vidal with the Mexican branch of the World Wildlife Fund, high temperatures and expanding...


Latest Danaus Reference Libraries

40_8ce94a775a333fe9368766757b029404
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
humgruffin
  • A terrible or repulsive person.
Regarding the etymology of 'humgruffin,' the OED says (rather unhelpfully) that it's a 'made-up word.' We might guess that 'hum' comes from 'humbug' or possibly 'hum' meaning 'a disagreeable smell,' while 'gruffin' could be a combination of 'gruff' and 'griffin.'