ISTR that when the last wild California Condors were taken in for captive breeding (the species was down to single-digit numbers) the conservationists, naturally intending to give their new charges the best care available, gave them an insecticide bath ...<p>... Not realizing that mites and lice are <i>extremely</i> fussy about their host species and frequently can&#x27;t live on another organism. As a result of which, the conservation process inadvertently rendered two species extinct.<p>(Moral of story: we tend to pay attention to charismatic megafauna and to horrible zoonoses that kill us, but in doing so our actions can have unforeseen side-effects. I don&#x27;t think anyone&#x27;s going to mourn the passing of the guinea worm <i>but</i> it has a life cycle that includes stages in non-human host species, and I don&#x27;t think we&#x27;re paying nearly enough attention to the implications. Oh, and the same goes for malaria, zika, and so on.)