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Published on Feb 21, 2013 by SciShow
As spring approaches in the Northern Hemisphere, we anticipate the fluttering butterflies and the capering baby lambs, and we can also expect to see some birds hammered out of their minds in the trees, and perhaps on the ground. In most cases, these birds have overindulged in the fermented berries and other fruits that froze during the winter and are now thawing – proving an irresistible treat for many kinds of birds.
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