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New York State Museum study suggest wolves migrating East
Wolf skull (or pelt) from the New York State Museum's mammal collections documenting the occurrence of an 85-pound wolf in Saratoga County. Recent isotope tests of the bone (or hair) of this animal by State Museum researchers showed that it had been eating a diet typical of wild wolves, and was therefore probably a natural immigrant to the area, rather than an escaped pet.

ALBANY, NY.- Researchers at the New York State Museum recently published a new study indicating that some wolves have migrated into New York state and other areas of the Northeast. Museum curators Dr. Roland Kays and Dr. Robert Feranec used a new isotope test for the first time to determine whether eight wolves found in the Northeast over the last 27 years had been living in the wild or had escaped from captivity. This is an important question for species, such as wolves, that are not known to breed in New York state, but are occasionally discovered here. Results revealed that three of the eight wolves tested were probably natural immigrants because they had a history of eating wild foods. One of these wild wolves was found in Saratoga County in 2001 and the other two came from Vermont in 1998 and 2006. The isotope signatures of five others suggested they had been eating food in captivity, and were therefore probably escaped pets or zoo animals. Kays and Feranec documented their work in a new article published in the Northeastern Naturalist, a peer-reviewed and edited online journal with a regional focus on northeastern North America.

Wolves have been extinct in the Northeastern U.S. since the late 1800s but survive to the north in Ontario and Quebec, and have recently been expanding in the Great Lakes. Although this research shows that there have been at least three naturally immigrating wolves in the Northeast, there is no evidence at this point to suggest that there is an established breeding population. Rather, it is likely that these few wolves migrated to the Northeast from the Great Lakes area or from Canada, looking for potential mates.

Citing other studies, Kays and Feranec note that the recent recovery of wolves throughout much of the Great Lakes region and increased protection of wolves in Ontario make it likely that even more wolves will migrate into the Northeastern U.S. in the near future. “There is substantial suitable habitat in Northern New York and New England that could support a viable population of wolves” says Kays.

If wolves were to become established, this new top predator would probably reduce coyote populations in the Northeast and change the behavior and densities of other prey, such as deer.

Feranec says that the new isotope test that they used “is based on the principle that you are what you eat” and involves measuring the carbon isotopes of hair and bone fragments of the wolves. Animals that eat corn-based pet food or grain-fed livestock accumulate a different carbon isotope in their bodies than those who find their own food in the wild. The isotopes in the hair represent the animals’ diet since its last molt, while those in the bone represent a lifetime average of the animals’ diet.

Kays and Feranec also used this new isotope test to show that a cougar found in Connecticut this past June had spent its life eating typical wild prey, and was not a captive animal that had escaped or been released. The test was requested by the Wildlife Division of the Connecticut Department of Energy and Environmental Protection (DEEP), and confirmed genetic and other evidence showing that this was a wild cougar from South Dakota that migrated through the Great Lakes and New York State, before being hit by a car in Connecticut.

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