Stick insects are part of the order Phasmatodea (from the Greek word phasma = ghost). There are about 2300 species of this insect known worldwide, mostly living in tropical and subtropical regions. In Italy there is the Bacillus rossius species , called the Italian stick insect . This strange creature loves to live by camouflaging itself in the bushes, taking a vegetarian diet. Due to the naturalistic interest, they hold among enthusiasts, these branch-like insects are often raised in terrariums.