This Long Now Lab explores the protocols needed to support interspecies ecologies — the interactions between humans, nature, and synthetic intelligences. Whales have a phonetic alphabet. Rivers hold legal rights. AI agents negotiate on behalf of humans they‘ve never met. Synthetic biology blurs the lines between species. The 21st century‘s defining governance challenge isn‘t any one of these developments — it‘s how all of these constituencies are increasingly asserting themselves, and we have few agreed-upon protocols for how to build the world together. This Lab — which will likely take the form of a course launching early 02027 — will convene frontier systems thinkers working on the technologies, communication norms, governance frameworks, and philosophies this transition necessitates.