http://www.almotamar.net صحيفة إلكترونية يومية تصدر عن حزب المؤتمر الشعبي العام (اليمن) http://www.almotamar.net/5878.htm 2009-02-13 The migration routes of two species of songbirds have been tracked for the first time, say scientists. They fitted tags to wood thrushes and purple martins in the north-east of the US before the birds began their journey to central and South America.