Monarch butterfly populations from western North America have declined far more dramatically than was previously known and face a greater risk of extinction than eastern monarchs, according to a new study in the journal Biological ...
Ecology
Sep 7, 2017
0
1101
Monarch butterfly populations have taken a nosedive over the last 20 years, according to researchers who monitor the number of butterflies that spend the winter in Mexico every year. But organizations of citizen scientists ...
Ecology
Aug 3, 2017
0
102
The number of monarch butterflies wintering in Mexico dropped by 27 percent this year, reversing last year's recovery from historically low numbers, according to a study by government and independent experts released Thursday.
Ecology
Feb 9, 2017
0
2139
In the face of scientific dogma that faults the population decline of monarch butterflies on a lack of milkweed, herbicides and genetically modified crops, a new Cornell University study casts wider blame: sparse autumnal ...
Ecology
Apr 22, 2016
0
612
Each fall, monarch butterflies across Canada and the United States turn their orange, black and white-mottled wings toward the Rio Grande and migrate over 2,000 miles to the relative warmth of central Mexico.
Biotechnology
Apr 14, 2016
10
111
Monarch butterflies have made a big comeback in their wintering grounds in Mexico, after suffering serious declines, experts said Friday.
Ecology
Feb 26, 2016
2
3561
Seasonal migrations may help lower infection levels in wild North American monarch butterfly populations, according to a study published November 25, 2015 in the open-access journal PLOS ONE by Sonia Altizer from the University ...
Ecology
Nov 25, 2015
0
502
Human activities are disrupting the migration patterns of many species, including monarch butterflies. Some monarchs have stopped migrating to their traditional overwintering sites in Mexico, remaining in the southern U.S. ...
Plants & Animals
Jan 29, 2015
0
73
Human activities are disrupting the migration patterns of many species, including monarch butterflies. Some monarchs have stopped migrating to their traditional overwintering sites in Mexico, remaining in the southern U.S. ...
Ecology
Jan 16, 2015
0
571
Each fall millions of monarch butterflies use a sophisticated navigation system to transverse 2,000 miles from breeding sites across the eastern United States to an overwintering habitat in specific groves of fir trees in ...
Plants & Animals
Jun 24, 2014
1
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