How many of your conlangs have animal noises? Do you have specific animal species in the worlds your languages inhabit as well? I've just found my old notes for one of my conlangs, called Yuun. Animals are kept in an area called "Maab kihaa", or "Place of livestock", and they all have different sounds, e.g. sheep - dκκκκκκ a certain type of local bird - reeeeca lizards - tetetetete etc. I'm toying with the idea of writing a couple of children's books in Yuun, just for fun.