When separated from a packmate, a wolf's howl intensity is determined by the closeness of its partnership with the departed individual, not by that individual's rank. Arielle Duhaime-Ross reports.
via Health News Headlines - Yahoo! News http://news.yahoo.com/wolves-howl-pals-not-leaders-161408557.html
via Health News Headlines - Yahoo! News http://news.yahoo.com/wolves-howl-pals-not-leaders-161408557.html
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