I've read in a number of places that G. gongylodes does not stalk its prey -- that it is an ambush predator and essentially stationary, waiting exclusively for prey to come to it. However, I've now observed that it does, in fact, stalk quite readily. On a number of occasions, I have observed nymphs to actively chase flies for up to 10 cm, and then catch them! However, this only occurs when they are sensing air movement. Under such circumstances, they begin to sway, and if the situation warrants it (i.e., prey is present) they will actively and aggressively pursue prey. My specimens are well fed, and I therefore do not attribute this behavior to a state of malnutrition. I'm curious to know if others have made this observation....