"We know of two on Tle, as we count species.
"Dryads are the species Wovenveil and I belong to. Mobile plants which use artificial chassis as skeletons. We grow steadily over time, eventually getting too large to stand and needing to either trim off memory-holding branches to send to a Grove or graft ourselves wholly to one. Groves are the final form of our kind, city-sized forests of Dryads whose minds have been merged together. They lead our people, function as our homes, and produce the seeds to grow new Dryads.
"Humanoids are an animal-like species - I infer that 'Rahi' is a term for animal? - which have 3 sub-species: Humans, who once lived on most of Tle's continents but are now effectively extinct. Ray-Solon, tentacled amphibians who live in tropical swamps. Merfolk, who live and breathe underwater. Theoretically they can all inter-breed to produce viable hybrids, which is why they count as a single species to us."