This is the first adult walking stick I've seen this summer. All others have been smaller, green nymphs. Walking sticks eat vegetation. Some dine on specific species while others are generalists. A Giant Walking Stick like this one can often be found on grape vines, grasses and oaks. Females grow up to seven inches long (180mm), making them the longest North American insect. This male was only about four inches long (101mm). The "clasper" at the end of its abdomen is for holding onto a female during mating.