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  1.                 From GNU Collaborative International Dictionary of English, version 0.54:
                

    
                
                  
    Yelper (?), n. An animal that yelps, or makes a yelping noise. Specifically: (Zool.) (a) The avocet; -- so called from its sharp, shrill cry. [Prov. Eng.] (b) The tattler. [Local, U. S.]
    

    [1913 Webster]