 The loudness of the song is correlated with the size of the male and the quality of the habitat , both indicators of male attractiveness . The loudest males may attract 20 females in one evening , when a quieter male may attract none . This behaviour enables acoustic trapping : females can be trapped in large numbers by broadcasting a male 's song very loudly . 
 The loudness of the song is correlated with the size of the male and the quality of the habitat , both indicators of male attractiveness . The loudest males may attract 20 females in one evening , when a quieter male may attract none . This behaviour <a href='uninflect' title='1'><mark>enables</mark></a> acoustic trapping : females can be trapped in large numbers by broadcasting a male <a href='null_genetive' title='2'><mark>'s</mark></a>song very loudly . 
The loudness of the song is correlated w da size of tdamale and thdauality of the habitat , both indicators of male attractiveness . The loudest males may attract 20 females in one evening , when a quieter male may attract none . dis behaviour enable acoustic trapping : females can b trapped in large numbers by broadcasting a male  song very loudly .