This sheds some light---still like to see some more pics----Cowboy
Over the past 9 years, Kays has photographed coyotes with remote motion sensor cameras, collected roadkill and scat, and obtained tissue and bones from fur trappers, hunters, and others. This material provided Kays and his colleagues with data to nail down the influence of wolves on eastern coyotes. The researchers sequenced a piece of mitochondrial DNA from more than 680 coyotes and measured the skulls of 196 animals. They grouped the DNA sequences by similarity and thus were able to trace the lineages of the various animals and determine their migration patterns.
The data showed that indeed coyotes arrived along southern and northern routes, with the descendents of the southern travelers having DNA much like that of their western counterparts, the researchers report today in Biology Letters. But the offspring of animals that had come along the northern route are much less genetically diverse--suggesting that a few individuals took this route--and have wolf DNA, most likely because their ancestors interbred with Great Lakes wolves. "The wolves are gone, but part of their genomes are still here," says collaborator Jeremy Kirchman, also with the New York State Museum. "This has allowed these coyotes to be so successful." The researchers did not find evidence of much hybridization with domestic dogs, as some have expected, says Kirchman.
Northeastern coyotes are not just larger but they also have wolflike features, the researchers found. These coyotes have wider mouths, with more surface area on the skull where chewing muscles attach, giving them a stronger bite for killing bigger prey. They eat more deer and they are comfortable in forests, much like wolves. More genetic studies are needed to pin down that wolf genes are responsible for all of these changes. But it's clear that "in many ways they are acting like a small wolf, but they look like coyotes," says Matthew Gompper, a wildlife biologist at the University of Missouri, Columbia, who was not involved in the study.