Mostly genetic but some of it will be environmental so that the animal knows what each sound their mother makes means. Often we wouldn’t be able to distinguish the different sounds but the actual animal can like a penguine can call his young amongst several hundred penguines and the baby will recognise its mum!
well they make noises to communicate…but the actual noises they make would be based upon the shape of their voice box and breathing chamber…like in Jurrassic park 3 when they build a vleciraptor breathing chamber…that limits the noise that can be made..
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