Bookbinders Snake Inks, from Bookbinders Online are, a series of, at the time of this writing, eight  inks. Bookbinder's released these two in their initial release of four inks (the other two from the initial release being Red Belly Black and Everglades Ratsnake). Bookbinders Online are a Brisbane, Australia based company that also bind their own Tomoe River notebooks (the ones I use in these reviews). Emerald Boa is a light green ink and Eastern Brown is a warm brown both with distinct characteristics from each other.