Many animals respond to chemical cues from predators with reduced activity.
However, relatively few studies have examined the response of insects to predator chemical cues. We predicted that G. pennsylvanicus , which is syntopic with H. helluo , would show decreased activity in the presence of predator cues compared to the commercially raised cricket, Acheta domesticus . Activity levels of each individual were recorded for a 1 h period. Field crickets exhibited significantly lower activity on all substrate types compared to house crickets. Field crickets showed a significant reduction in time spent walking and time immobile on H. helluo treatments compared to either conspecific or the blank control.