mŭtĭcus , a, um, adj., for mutilus,= hornless !
So it's not like some said ... muticus = mute.
I looked for another animal whose Latin name is muticus.
I found a spider from Tanzania: King baboon spider - Pelinobius muticus.
The first feature of this spider is that it's an aggressive ... it attacks ... like Pavo muticus! ...Thai Boxing!
Old Green peacock breeder of Germany translate the name Pavo muticus in the quietly peafowl or the mute peafowl
His voice we heard only in the breeding season the rest of the year he is very quiet