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== Migrating Birds Stay In The Air For Half A Year Without Touc ==
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<html>The researchers had been hoping to gain insight into the birds' energy expenditure during their migration from North Africa to their summer breeding grounds in Europe, thereported.<br>
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"We wanted to learn about energy demands during migration. We expected to see how often they fly, how often they stop, that sort of thing," Liechti said.<br>
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When the researchers removed the alpine swifts' tags upon their return, they discovered the shocking information.<br>
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When we looked at the data, we were totally blown away," Lietchi said. "During their non-breeding period in Africa, they were always in the air."<br>
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For the entire 200 days the birds spent over Africa they never touched the ground. The chips only recorded data every four minutes, so there is a possibility that they snuck in a quick landing, but no evidence of this happening was ever recorded on the chips over the entire six month period.<br>
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This was the first time this kind of chip has ever been used to monitor birds' migration activity. The technology allowed the researchers to compare the birds' acceleration and pitch to see if they were actively flying,[http://thismuchiknowtobetrue.com/forum/topic.php?id=131154 Penis Anxiety Does Not Correlate to Size, 'Penis Shame&], gliding, or resting on the ground.&nbsp;<br>
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The alpine swift relies on airborne plankton as a food source and have the ability to sleep in the air, which could explain how they stayed in the air for so long.<br>
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"It has been assumed that the birds 'sleep' only for seconds, or use only half if the brain while the other half is resting," Lietchi said, New Scientist reported.&nbsp;<br>
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Other groups have suggested that the bird doesn't sleep at all,<strong>[http://kathakalinews.com/wholesale-nfl-jerseys-cheap.html wholesale nfl jerseys china]</strong>.&nbsp;<br>
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"Our group has shown that&nbsp; dolphins and killer whales remain active for at least 90 days without sleep and with greatly reduced sleep for up to 150 days after birth,"&nbsp; Jerry Siegel, of the University of California at Los Angeles,<strong>[http://symbiosisnetwork.com/showJobDetails.html basketball jerseys cheap]</strong>, said.<br>
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Siegel also said sandpiper birds stay awake throughout breeding season.&nbsp;<br>
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"What all this work tells us is that when it is adaptive for animals to remain awake, evolution allows that, so I think the idea that swifts must sleep and are therefore 'sleep-flying' is incorrect," Siegel said.<br>
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Flight pattern of the alpine swift. (Flickr)
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