Tower 42′s Bird Study Project 2011
May 20, 2011 10:12 PM 
LONDON, ENGLAND – APRIL 08: Bob Hallewell (C), a member of the Tower 42 Bird Study Group, observes and collates data on migrating birds from the top of the City of London’s tallest occupied building on April 8, 2011 in London, England. The group, led by David Lindo who is known as ‘The Urban Birder,’ have observed several rare birds in the Capital from the top of the 600ft tower. (Photo by Oli Scarff/Getty Images)
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