News Life Bird feeding, migration could be splitting a species German birds that spend cold months at U.K. birdfeeders now look slightly different from neighbors that migrate to Spain Share this:FacebookTwitterPocketRedditPrintEmail By Susan Milius December 3, 2009 at 5:29 pm This article is only available to Science News subscribers. Subscribers, enter your e-mail address to access our archives. Client key* E-mail* Log in Not a subscriber? Science News is a nonprofit. Support us by subscribing now. Subscribe