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A FB poster passes along this fairly interesting background & overview of eDNA (1+ year-old article) as a tool in biological research. eDNA has been more regularly appearing in IBWO-search discussions, though still not too sure how practical it is, let alone how definitive… The article calls it “relatively inexpensive” though one of the complaints I’d heard in the past was that the number of samples and tests that might be needed in looking for IBWOs would be too expensive (of course costs are always coming down)…. depends in part on circumstance: if you found an area of interesting bark-scaling it might require several samples to try for a “hit.” But say someone claims to see an Ivory-bill emerge from a cavity somewhere, probably just a couple of samples from in or around that hole might suffice. I'm not aware of any current IBWO searchers actively employing eDNA, though I think some have gathered the info needed to utilize it if a really promising opportunity arises.
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