It is worth noting that the range of their vocal signals is very wide, and sometimes they output whole arias, the tone, and volume of which depends on their state of mind: these can be whimpers, grunts, moans, or calls.
It is worth noting that the range of their vocal signals is very wide, and sometimes they output whole arias, the tone, and volume of which depends on their state of mind: these can be whimpers, grunts, moans, or calls.