It interbreeds in Siberia with C. caniceps, an East Siberian form.
"The History of the European Fauna"
R. F. Scharff
Some naturalists would separate them from the other cats, but the connection is supplied by the last species which, though possessing certain features of the lynx, yet interbreeds with the true cats.
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale
Gavaeus frontalis interbreeds freely with domesticated cattle of all kinds.
"Natural History of the Mammalia of India and Ceylon"
Robert A. Sterndale