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I goofed below in the second paragraph, in which the second sentence should read, "But the juveniles lacked a continental MAP (not compass, which they had for taking a heading)....." Cheers again from Jim in Wolfville ---------- From: Jim Wolford <jimwolford@eastlink.ca> Date: Mon, 12 Nov 2007 18:16:10 -0400 Subject: [NatureNS] compass vs. maps in brains of migrant birds, adults vs. juveniles -- from Quirks & Quarks, Nov. 10/07: Big Bang ideas, messing up migration, soft-bodied fossils, killifish and chemicals Many of you know that I am a big, big fan of Quirks and Quarks on Saturdays at noon on CBC Radio One (****and also on Mondays at 11 p.m.****). This past Saturday's show contained an item on WHITE-CROWNED SPARROWS, which were trapped in Washington state on their migration from Alaska to the U.S. southwest or Mexico. Thirty birds were trapped, half adults and half juveniles (a few months old). After being flown to New Jersey (Princeton University, all were fitted with transmitters, released, and then followed for a week or so by small plane and vehicles. They found that the adults adjusted after a few days, seemingly having figured out where they had to go to get back on track, and headed southwest. But the juveniles lacked a continental compass and continued to travel in the direction in which they were headed in Washington state, namely south or southeast. Go to the Q & Q Web-site (just Google "quirks", click on the radio home page, then click on most recent program, then listen to the item in question. OR tune in tonight at 11 p.m. and do what I do, i.e. tape the whole show, then listen to it gradually during the week.) Cheers from Jim in Wolfville ------------------
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