1. 
   Bullen-bullen
   Bul'len-bul'len noun [ Native Australian name, from its cry.] (Zoology) The lyre bird.
   Found op http://www.encyclo.co.uk/webster/B/111
   
   
2. 
   bullen-bullen
   <zoology> The lyre bird. ... Origin: Native Australian name, from its cry. ... Source: Websters Dictionary ... (01 Mar 1998) ...
   Found op http://www.mondofacto.com/facts/dictionary?bullen-bullen
   
   
3. 
   Bullen-bullen
   • (n.) The lyre bird.
   Found op http://thinkexist.com/dictionary/meaning/bullen-bullen/
   
   

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