It helps to think of a species as a cloud of dots clustered around a central point we'll call "Norm."![](http://tomsquotes.amhosting.net/sitcom/cheers/norm/wfrasier.jpg)
Norm!
(Sorry, but if I didn't do it, you know someone else would have.)
The one on the left is probably a "species." The one seated is more like a "kind." Neither looks like an "ilk."