The reintroduction objective is to re-establish a wild population of at least 100 Mexican wolves.
The eggs, from the wild population of Eurasian cranes in Germany, were transported to Gloucestershire by road.
What is surprising is that this is the first report of this from a wild population of fish.
They don't breed, and no fish are added back to the wild population.
The ferrets escaped into the wild and thrived to the extent that New Zealand has the largest wild population in the world.
Edinburgh Zoo said the wild population was in its healthiest state since before World War II, but remained at serious threat of extinction.
Rescued orang-utans, of whom more than 300 are in her care centre in the park, could be freed without danger to the wild population.
Sweden's environmental protection agency said the aim was to eliminate inbred wolves and improve the gene pool of the wild population, but conservationists dispute this.
The wild population has declined due to habitat destruction.
"The polar bear does not have a small wild population, it does not have a restricted area of distribution and no marked decline has been observed, " Environment Canada says on its website.
Despite that all the engineered salmon will be sterile females and that they will be farmed only far inland, he remains skeptical of assurances that there is virtually no possibility of escape and interaction with the wild population. (Not that it would make any difference if that did occur.) Why?
The wild pig population in the U.S. has ballooned to more than 5 million.
Humans wiped out the indigenous wild animal population a century ago, but now the animals are back, carefully restocked and maintained in growing numbers.
"The lower the population of wild salmon, the greater the risk is because it takes less and less genetic infusion to corrupt it, " he said.
It says much about Los Angeles and the lack of cohesion of its elite that Mr Chandler could virtually disappear into the African bush on a quest to reduce the world's population of wild animals, and not be missed in the tonier precincts of Hancock Park or San Marino the gilded ghettos of sunny southern California.
Just as iconic a symbol of the area is the hardy population of 150 or so wild horses, who have adapted to be able to go without water for longer periods than domestic horses, surviving for generations on the desert's fringe.
This creates a selection pressure which drives the genes through the population, as the offspring of wild flies die more often than those of engineered or hybrid flies.
Winthrop (population 394), made over with a Wild West theme in the 1970s, is a bizarre apparition, especially in the winter when lines of skinny Nordic skis instead of horses stand sentinel outside the storefronts.
Canada will not take the wolves back, there is little room in zoos, and there is no appropriate wild space in the United States that could handle a population of wolves such as the one in Yellowstone.
Many of the most critically affected species are found in China, including Magnolia phanerophlebia, of which only around 200 trees are estimated to exist in the wild and Magnolia sinica, believed to have a single population of fewer than 10 mature trees.
Today, the Whooping Crane population numbers more than 600, either in the wild or in captivity.
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We have got a captive safety net population, we are re-introducing into the wild.
There were once hundreds of elephants roaming this area, but hunting and deforestation have almost wiped out the population, with as few as one or two elephants remaining in the wild.
Work is under way to clone and otherwise increase the population of Sumatran rhinos, which presently number only about 200-300 in the wild.
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