This article is reprinted with permission from Inside Science, an editorially independent news product of the American Institute of Physics, a nonprofit organization dedicated to advancing, promoting and serving the physical sciences.Somewhere deep in the remote and largely inaccessible wetlands of northern Myanmar, Richard Thorns hopes to find a ghost. This fall, the ambulance driver and amateur ornithologist plans to leave his home in Crowborough, England, to launch his seventh expedition in search of the elusive \u2014 and quite possibly extinct \u2014 pink-headed duck.The striking but shy bird was always a rare sight in the marshes of India, Bangladesh and Myanmar, and little is known about its behavior and habits. Its large, dark brown body, with characteristic pink plumage adorning its head and neck, has not been conclusively seen in the wild since 1949. But Thorns has made it his personal mission to prove that the bird is still out there.Thorns was working in a department store when a chance encounter with the story of the pink-headed duck in a library book captured his imagination nearly 20 years ago. \u201cThere wasn't a lot going on in my life career-wise or ambition-wise then,\u201d he said. \u201cWhen I read that book, I decided I didn't want to be shop assistant anymore. I wanted to find the pink-headed duck.\u201dIn 2009, after years of planning and saving money, Thorns made his first trip to Myanmar, a Southeast Asian country formerly known as Burma, which for years has suffered from ethnic strife and from 1962 until 2011 was ruled by the military. \u201cI flew in naive,\u201d Thorns said. \u201cI didn't realize so much of was so fiercely guarded and locked down.\u201dWith help from Myanmar's Biodiversity and Nature Conservation Association, he found a promising location to begin his quest, along the Irrawaddy River north of the town of Bhamo in Kachin State. The search was filled with difficulties \u2014 at one point, he and his unlicensed local guide learned that the authorities were looking for them, and had to sneak back into the village after dark. Still, Thorns persisted, embarking on five more expeditions in the subsequent years.While Thorns has never spotted his quarry on any of his trips, he has encountered several locals who claimed to have seen the ducks in the wild. So he is optimistic about his chances on the upcoming trip. He believes the closed nature of the country favors the bird\u2019s survival, since areas remain where few people are allowed to travel.For his seventh duck hunt, Thorns has devised a new plan of attack. And he has the backing of a new global project to seek out and protect \u201clost species.\u201dLost and foundThe pink-headed duck is just one of many species that have gone AWOL, with no definitive proof whether they are extinct or still alive. In an effort to find some of the missing and draw attention to their stories, Global Wildlife Conservation, an Austin, Texas-based environmental group, has launched the \u201cSearch for Lost Species\u201d \u2014 a worldwide hunt for animals and plants that haven't been seen for years.GWC spent almost a year consulting conservation specialists from around the world on which lost species they would most like to see found. Their initial list included more than 1,200 options. \u201cIt wasn't easy to choose,\u201d said Robin Moore, a conservation biologist based in Austin and the project's leader.They eventually narrowed it down to the 25 \u201cmost wanted\u201d species: 10 mammals, three birds, three reptiles, three fish, two amphibians, one insect, one crustacean, one coral and one plant.\u201cThe top 25 is a way to capture the public's imagination,\u201d said Moore. \u201cThey are fascinated by the mystery surrounding them.\u201dSome choices were a no-brainer \u2014 the duck, for example, was nominated multiple times. Others had been missing for an impressive amount of time, like the Himalayan Quail, which has not been seen for 141 years. Or they were extra compelling mysteries, like the Bullneck Seahorse, which has never been spotted alive in the wild and was last collected, perhaps by accident in a fishing net, in 1996.In building the list, GWC worked to ensure that it included not only a wide variety of animals, but also a wide geographic spread covering many types of habitat and places where there are local partners who can help lead the search.GWC has some experience with this type of project. In 2010, the group launched the \u201cSearch for Lost Frogs\u201d in partnership with Arlington, Virginia-based Conservation International, aimed at finding the top 10 missing amphibians. Within the first year they had rediscovered three \u2014 including one from Borneo that hadn't been seen for more than 100 years, and one in Israel that had been declared extinct after 55 years without a sighting.They learned from those successes that the excitement that comes with a species rediscovery can provide a big boost for their work, attracting attention and money for ongoing preservation efforts. \u201cThe stories it generates can create these emblems of hope and resilience,\u201d said Moore. \u201cPeople are more likely to engage with conservation if it's not always doom and gloom.\u201dThere is a debate in the conservation community over whether high-profile, expensive campaigns focused on a few flagship species \u2014 especially ones that may no longer exist \u2014 are the best use of scarce resources. Ernest Small, a botanist with the Canadian department of agriculture in Ottawa who has written about conservation's fixation on flagship species, said he finds the lost species idea a bit gimmicky. \u201cNow I don't mind gimmicks, but as ideas go this one seems a bit far out,\u201d he said.He added that by focusing on large, attractive animals conservationists lose an opportunity to educate the public and politicians about the importance of preserving habitats and planetary ecosystems \u2014 though he admitted that is a tough sell at the best of times. \u201c is probably the best we can do\u201d to get people's attention, he said.He wonders, then, if this collection of mostly small creatures that live in far-flung corners of the globe will be successful at getting donors in the Western world to open their wallets. \u201cPeople like to support things that are big and exciting, like elephants, or that live close to home, like monarch butterflies,\u201d he said.Jean-Christophe Vi\u00e9, deputy director of the species program at the International Union for the Conservation of Nature in Gland, Switzerland, is a big believer in the power of an individual species' story to get through to the public. \u201cWe need stories to reconnect people to nature,\u201d he said. \u201cWe're not going to reconnect to them with fuzzy concepts like carbon sequestration and ecosystem services.\u201dBut finding a lost species is only the first step, warns Vi\u00e9. The discovery can give the impression that perhaps the species is not in as much trouble as thought \u2014 when in fact it is likely highly vulnerable, and will require protection.\u201cFinding one is, in itself, not that useful,\u201d said Vi\u00e9. \u201cFinding it and doing something about recovery, that is interesting.\u201dSmall agrees. \u201cIf they find one, what are they going to do? These species are really at the brink, it will be hard to keep them going,\u201d he said.Moore said GWC's commitment to a species will not end with rediscovery. They will also work to identify the threats it faces, and to preserve the habitat. During the frog search, for example, they helped to set up the first private nature preserve in Haiti to protect the six lost and new species of frog they found. Efforts like this have the added benefit of protecting everything else that lives nearby, noted Moore.For both the frog and new lost species project, GWC was careful to choose species that represent areas that are important to protect, he said.GWC is currently raising funds to support expeditions, and finding local partners that can help with the search and take the lead for ongoing conservation efforts. Thorns' duck hunt this fall will be one of the first, followed by an expedition to Indonesia early next year by nature photographer Clay Bolt in search of Wallace's Giant Bee \u2014 the world's biggest bee, originally described by famed naturalist Alfred Russel Wallace in 1858. It was not seen again until 1981, and hasn't been seen since.All of the searches are probably pretty long shots, said Moore. But there are signs of hope. Local reports from Indonesia in 2007 provide some evidence for the survival of Attenborough's Long-beaked Echidna, named after naturalist David Attenborough and missing for 56 years. And though the Fernandina Gal\u00e1pagos Tortoise hasn't been seen since 1906, a 1964 expedition found possible droppings of the long-lived reptile, as well as cactuses that appeared to have been chewed by a tortoise. That search in particular fascinates Moore. \u201cHow do you lose a giant tortoise on an island?\u201d he asked.Bolt, for his part, is cautiously optimistic for his bee hunt. The bee's habitat on a remote Indonesian island chain seems to be mostly intact, and he has been in touch with the 1981 team to learn about where and how to look. \u201cIt's certainly a vulnerable species, but most likely it's only missing because no one has gone looking for it,\u201d he said.Heart of ducknessMoore thinks the pink-headed duck is one of the project's more speculative efforts. \u201cLots of people have been looking for it quite intensively for a long time, so the odds are extremely long,\u201d he said. \u201cBut it's high-risk, high-reward. If we were to find it, it would be absolutely incredible.\u201dThorns, though, figures he might be on the verge of a breakthrough. He has a theory that the ducks migrate seasonally within Myanmar, living in the wetlands of Kachin State during the wet season, then moving somewhere else during the dry season \u2014 perhaps one of the numerous totally restricted military areas. Since most searches by ornithologists have been conducted during the dry season, it's possible the ducks have simply been elsewhere.\u201cNo one is looking in the wet season. The only people who have described seeing it to me have been fishermen or farmers, locals who are there year-round. So it must migrate somewhere no one is allowed to be,\u201d he said. \u201cI'm not thinking like a birdwatcher, but a cryptozoologist,\u201d he said, referring to people who aim to prove the existence of creatures from folklore, like Bigfoot or the Loch Ness Monster.So on this trip, accompanied by the writer Errol Fuller and photographer John Hodges, Thorns will search the wetlands around Indawgyi Lake at the tail end of the wet season, when any ducklings will have fledged but should still be hanging around the nest.And he's changing his search technique. Previous trips have involved paddling about in boats, which can only gently nose into the dense elephant grass where the birds nest. The retiring ducks, if they were there, likely just hunkered down and waited for the boat to move on, Thorns thinks. So this time he and his companions will use elephants to ride right through the grassy swamps, hoping to flush the birds out.\u201cWe're replicating the techniques of the British Raj,\u201d he said. India's colonial rulers used to spot \u2014 and shoot \u2014 the ducks while hunting tigers from elephant-back in the 19th and early 20th centuries. Thorns said the birds are probably used to wild elephants in that area, so should not be unduly stressed by the search. \u201cWe might have to almost be on top of them before they break cover,\u201d he said.With his new theory and new search plan ready, Thorns has high hopes that this trip will be the one that makes history. \u201cI think I can almost say that the search is over,\u201d he said.If the search for the duck, or any of the other most wanted species, indeed proves successful, it will be a huge boon for conservation efforts, said Moore. And it will provide an opportunity for us to do a better job of protecting these fascinating species this time around. \u201cIf we give them a second chance, they can surprise us,\u201d he said.