I have a very hard to e telling them apart. I know the physiological difference between the two animals but there seems to be very little visually to separate the two. Best I've picked out, boas seem to have a more prominent rounding to the top of their head than pythons, but I pt this idea into action looking through a book and guessing, and the damn emerald boa was mistaken by yours truly for a gtp... haha I'm going to embarrass myself. Any tips?