From Wikipedia
http://en.wikipedia.org/wiki/Canid_hybrid

Many animals commonly referred to as "eastern coyotes" or "northeastern coyotes" have wolf and dog genes, a larger size and a more wolf-like skull shape than other coyotes, and they are generally believed by experts to be hybrids. This has become a problem for taxonomists, as it is unclear what new taxon will be used to refer to this new population of animals.[5]