See also this recent Economist article [1] on a new species, the coywolf, found in North America and their comments on the difficulty of deciding if it is, in fact, a new species.  And associated HN discussion [2].<p>[1] <a href="http:&#x2F;&#x2F;www.economist.com&#x2F;news&#x2F;science-and-technology&#x2F;21677188-it-rare-new-animal-species-emerge-front-scientists-eyes" rel="nofollow">http:&#x2F;&#x2F;www.economist.com&#x2F;news&#x2F;science-and-technology&#x2F;2167718...</a><p>[2] <a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10475739" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=10475739</a>