Suzuki says that when birds perch on a branch, their wings similarly become free, which could have led to the development of gestures like the “after you” wing flutter.

These Small Birds Flutter Their Wings to Say ‘After You’ to Their Partner A new study of Japanese tits provides the first evidence of non-primate animals using gestures to convey messages ...

News Nightjar has bird world in a flutter European Nightjar was spotted at Robindale in Randburg.806 Picture: Matthews Baloyi 1/29/2013 Published Jan 30, 2013 | Published Jan 30, 2013 ...