Look see the green caterpillar amazonca sterling childrens books skip to main contentca hello select your address books hello sign in account lists account returns orders cart all best sellers gift ideas . The small young caterpillars are black with a white saddle and look exactly like a bird dropping the older ones are a beautiful green and black pattern if you find one give the front end a very gentle squeeze and orange horns will pop out these are called osmeteria they smell bad and also resemble a snakes tongue. Look see the green caterpillar amazonca la coccinella books skip to main contentca hello select your address books amazonca en c account lists account returns orders cart all best sellers gift . Mature black swallowtail caterpillars papilio polyxenes have a lime green body and striking black stripes in their immature stage these larvae look black and almost resemble bird droppings the best way to identify these green caterpillars is by their colored stripes each segment of their body has a black stripe with yellow dots on it