https://phys.org/news/2019-01-dna-wolf-declared-extinct-wild.html

"Overall, it's incredibly rare to rediscover animals in a region where they were thought to be extinct and it's even more exciting to show that a piece of an endangered genome has been preserved in the wild," said Elizabeth Heppenheimer, a Princeton University biologist involved in the research on the pack found on Galveston Island in Texas. The work of the Princeton team was published in the scientific journal Genes.

The genetic analysis found that the Galveston canines appear to be a hybrid of red wolf and coyote, but Heppenheimer cautions that without additional testing, it's difficult to label the animal.