<Li> Jump up ^ CJ Kazilek, David Pearson and Pierre Deviche . "Birds and their songs", Ask a Biologist . Arizona State University . (n.d) Retrieved 11 May 2013 from http://askabiologist.asu.edu/explore/birds-and-their-songs </Li> <Li> Jump up ^ Honeybee Communication . 19 March 2012 . Retrieved 11 May 2013 from http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/B/BeeDances.html </Li>

What are the universal characteristics of human language