Just pointing out what I interpreted as a slight discrepancy, between one of the fauna and the nature of dryad links.
In the dryad article:
"Once in her long life a dryad can share a version of this link with another being, regardless of that person's race. This special link connects that person to the dryad alone, and not to the greater dryad network."
On Saurotaurans:
"Most of them are linked to dryads, whom they worship and to whom they offer prisoners as sacrifices."
This would seem to allude to entire tribes being linked simultaneously to a single dryad in a religious-like manner.
What the Swamp Dryad article has to say on their link:
"Swamps dryads have developed a link with some of the other creatures like the harpies and the saurotaurans."
So, I may not be aware of an ability for swamp dryads being able to create multiple links, or even interpreting the Saurotauran's wording wrong, but it seems to me that Swamp Dryads appear to bypass the one-link-a-lifetime norm.