Javier Monzón’s work at Stony Brook University, in New York State, showed that coyote DNA comprises 65 percent of the average coywolf’s genetic material, while wolf DNA represents 25 percent, and the remaining 10 percent is dog. It appears that the coywolf inherited the best traits from all three lineages. The incredible adaptability of the Western coyote, coupled with the large size and strong jaw muscles of wolves, enable the coywolf to be an extremely effective deer predator. Likewise, researchers believe that the inclusion of dog DNA has enabled the coywolf to be more comfortable in urban settings than wolves or coyotes normally would. Known coywolf populations exist in several Northeastern metropolitan areas, including Boston and New York City.