The stick insect you put up a picture of is the Jamaican stick insect. It, and the Florida (A buprestoides) stick insect are the two that need to be avoided and really should not be sold as pets. The best thing is to buy from a reputable company that knows what they are supplying and provides information on the creatures they sell. I can recommend Small-Life Supplies who have been going for years. They also sell a good book about various stick insects - including the Pink Winged stick insect, which as I said is completely harmless. Incidentally, Pink Winged stick insects are also parthenogenetic (like Indians) as are many other types of stick insects.