 
                    
            Birds Share Universal ‘Whining’ Alarm Call Against Nest Parasites Across 53 Million Years of Evolution
        A remarkable discovery shows that birds across four continents use nearly identical “whining” alarm calls to warn others about parasitic birds near their nests. This finding, published October 3 in Nature Ecology    
    
        
    
        
     
             
                 
                     
                     
                     
                     
                     
                     
                     
                    