PhysOrg Posted April 20, 2012 Share Posted April 20, 2012 Golden eagles love Pennsylvania's ridge-and-valley region. The hunched-up topography, with its long linear corridors running southwest to northeast, makes a perfect thruway for their spring and fall migrations. Sustained updrafts along the ridge crests are a particular boon to these and other large raptors, who rely on lift for soaring long distances. View the full article Link to comment Share on other sites More sharing options...
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