By learning to open the automatic doors enclosing their home, the behavior of these intelligent swallows proves yet again how smart and adaptable nature can be. The nesting birds found out how to fly up close to trigger motion detectors on doors, allowing them to go in and out of this building as if it was their own.
via Gizmodo http://ift.tt/1h65jtA http://ift.tt/1mtZh50
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