Equine breeds, such as the
American Cream Draft, were among the reasons that the organization was formed, and were on the earliest conservation priority lists. The Conservancy has assisted in extensive genetic studies of rare horse breeds, focusing particularly on strains of the
Colonial Spanish Horse. Rabbits, having only been added to the CPL in 2005, have been among the least studied, although in 2010, the organization named the
American Rabbit as the most endangered breed of rabbit in the US. Work with cattle has also been limited, although in one case, a member rescued the last of the
Randall Cattle herd from slaughter; the breed has since been built up to more than 300 members. In 2007, the organization partnered with the
Equus Survival Trust in a project to preserve the breed that included DNA sampling, the creation of a new
studbook and mapping the genetics of the breed. The Conservancy participated in the rescue of the Wilbur Cruce strain of Colonial Spanish horse when the area in which it lived was to be turned over to a land conservation program that required domestic animals to be removed. After the rescue, a conservation plan was developed for the animals and small breeding groups of horses were placed with responsible parties.
Sheep and goats ewe, a breed listed as critical In December 1987, the Conservancy performed one of its first breed rescues when it removed a viable population of
Santa Cruz sheep from
Santa Cruz Island. The sheep were in danger of being eradicated by
The Nature Conservancy, which was working to save indigenous vegetation that the breed used as food. The first twelve lambs were removed from the island in 1988, with further animals brought to the mainland in 1991. The population now stands at 125 animals and is considered an important genetic resource due to its island heritage, which kept it isolated from other breeds and forced it to adapt to adverse conditions. Beginning in the early 1990s, the Conservancy worked to preserve the
San Clemente Island goat, a rare Spanish-descended breed from California. In 1991, it added genetic material from the San Clemente to their genetic database, later transferred to the National Animal Germplasm Program. As of June 2010, the organization was working on the rescue of a group of feral
Spanish goats from an island in
South Carolina. There are less than 2,500 members of the breed in the United States, and the island group is one of only two
bloodlines known to exist in the southeastern US. Conservancy members first made trips to the island to document and photograph the herd of around 30 goats, then undertook action to remove some goats from the island to preserve the bloodlines from threatened extinction. A small flock was established in a nature preserve just south of
Murrells Inlet, South Carolina, and as of June 2010 plans were in place for satellite herds to be established.
Pigs s, listed at critical status In the course of its breed surveys and monitoring, the Conservancy has found significant changes in the populations of several swine breeds. The
Berkshire breed has increased significantly in number, partially due to international demand for its meat, while other breeds have shown significant decreases, most likely due to increasing consolidation of the pork industry to large producers who use only a few specialized pork strains. Breeds such as the
Chester White and
Poland China have seen population numbers reduced by over 25 percent between 1998 and 2003, while the
Hampshire and
Yorkshire breeds have decreased by more than 30 percent in the same time. and in 2000, it was asked to create a unified breed registry for the Red Wattle Hog. Three hogs were registered in the first year, but the next year 90 hogs and three breeders were represented and a breed association was created. By 2008, 111 breeding stock hogs had been registered and 56 breeders were part of the Red Wattle Hog Association. In November 2008, the Conservancy started the Rare Breed Swine Initiative, which, in cooperation with other organizations, assists in training breeders and cultivating the rare breed pig market. The three main foci of the initiative are marketing breeding stock and products, conserving bloodlines and supporting breed associations. As of 2010, proposals were in place for the funding of a study of porcine genetics, including variability and relationships among breeds, with the aims of maintaining
genetic variability among rare pig breeds and releasing a definition of heritage pork.
Poultry turkey, designated as watch status A breeding program for
Buckeye chickens was developed in 2005 by staff members, focusing on using
selective breeding to improve the breed and expand its numbers. In 2011, the Buckeye was able to be moved from "critical" status to "threatened", based on a 2010 census that found almost 2,500 birds. The program has since become the template for similar programs focusing on the preservation of other rare chicken breeds. Heritage turkey breeds have been a focus for the organization since 1997, when a survey showed only 1,335 breeding stock birds of all breeds. A study conducted by the Conservancy and
Virginia Tech concluded that heritage turkey breeds had stronger immune systems than those breeds typically used by industrial growers, and as such were more likely to survive disease epidemics. This study and other programs increased awareness of heritage turkey breeds and by 2003 the breeding population stood at 4,275 turkeys of all breeds. By 2007 this had grown to more than 10,000 birds and 17 breeds were no longer considered to be almost extinct. ==References==