An interesting New York Times article describes how researchers have discovered that coyotes in the Northeast are actually part wolf http://www.nytimes.com/2010/09/28/science/28coyotes.html?_r=1&emc=tnt&tntemail1=y.
“Coyotes have remained so much in possession of their own secrets that it was not until this year that the real identity of the coyotes living in the eastern part of the country was revealed. Two separate teams of researchers studying the genes of coyotes in the Northeast reported evidence that these animals that have for decades upon decades been thought of as coyotes are in fact coyote-wolf hybrids.”
“There are even hints that the traveling coyotes may have been up to more than just dawdling with a wolf or two. Dr. Kays’s team also found one coyote carrying something similar to domestic dog DNA, suggesting that the question of what exactly an Eastern coyote is may become even more complicated as scientists learn more.”
“No wonder, then, that interactions among these species have led to a genetic mess that researchers sometimes refer to as “Canis soupus.”