16 Jun '11, 3am

Periodical Cicada: The Insect that Can Live for 17 Years

Periodical Cicada: The Insect that Can Live for 17 Years

Introducing the Periodical Cicada The word "periodical" refers to the fact that these insects appear only after a regular period of time. One brood of Magicicada septendecim , for example, emerges after seventeen ("sept endec im") years. The thirteen-year cicada is a related family. Cicadas are native to North America. The 17-year cicadas tend to live farther north, in Pennsylvania for example, compared to the 13-year cicadas, which inhabit the American southwest. Both the 17-year and 13-year cicadas have three families. Distinguishing Locusts from Periodical Cicadas Photo: wwarby Locusts are members of the order Orthoptera , or ("ortho-winged"), insects which includes grasshoppers. Locusts swarm at irregular intervals, and so are noticed by the public and garner news coverage. However, locusts swarm in response to a combination of environmental conditions, including popul...

Full article: http://www.environmentalgraffiti.com/animals/news-periodi...

Tweets

It's our 40th birthday! Here's a look at some of our work over that time

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foe.co.uk 17 Jun '11, 10am

Friends of the Earth's first campaign action. Returning thousands of empties to the London HQ of Cadbury Schweppes in 1971...

Tune into the tournament now! You can watch the @PGATOUR's Live@ coverage from 11-6: #trvchmp

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pgatour.com 23 Jun '11, 3pm

Travelers Championship presented by Travelers Insurance June 23 - 26 The world's best golfers tee it up at the 2011 Travel...

2000 Years of Sea Level

2000 Years of Sea Level

realclimate.org 21 Jun '11, 12am

Sea level evolution in North Carolina from proxy data (blue curve with uncertainty range). Local land subsidence is alread...