After listening to them for over six years I can, owing to the `intergradiation' of signaling, differentiate one flock from another by vocalizations alone. The less stressed they are the more the indvidual `yap' predominiates. The greater the tension the more stereotypy predomininates. Pretty much the same the rest of us `vocalizing' vertebrates:
https://www.backyardchickens.com/forum/viewtopic.php?pid=921155#p921155 (post 6).
https://www.backyardchickens.com/forum/viewtopic.php?pid=921155#p921155 (post 6).
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