All this talk of interspecies mixing got me wondering just how exactly our various species are related so I made up this little chart of evolutionary relations just based on proximity to each other plus similarities in pictures and descriptions.
Cindorayi are omnivores, missed it in my sheet but yeah.
If two species could mix and produce a hybrid it would open up a issue not had between two species. If two species could produce even sterile hybrids would be chance with hybrid vigor that the hybrid is superior to parents. Could produce two different hybrids like lions and tigers can make either Liger or Tigon. So many possibilities and threats that could happen for two species. A species could die out but live on in blood of another species through hybrids.
Two species could work together to produce sterile hybrids to produce better soldiers. Could run into all sorts of issues between two species. Imagine two species both are ruled by kings and they can produce fertile hybrids, exchanging of children could result in leadership being run by hybrids. Would be so many possibilities but would be limited to select cases naturally until technology advanced highly.
The last thing you need is more super soldiers, Neruu
In regards to the various species, noted and will be added when I have time.