01885nas a2200205   4500008004100000245015000041210006900191260001100260300001400271490000800285520122200293653001401515653001301529653001101542653001501553100002501568700001901593700001901612856004801631       2009                        eng d00aGleaning bat echolocation calls do not elicit antipredator behaviour in the Pacific field cricket, Teleogryllus oceanicus (Orthoptera: Gryllidae)0 aGleaning bat echolocation calls do not elicit antipredator behav  cAugust  a769–7760 v1953 aAbstract&nbsp;&nbsp;Bats that glean prey (capture them from surfaces) produce relatively inconspicuous echolocation calls compared to aerially foraging bats and could therefore be difficult predators to detect, even for insects with ultrasound sensitive ears. In the cricket Teleogryllus oceanicus, an auditory interneuron (AN2) responsive to ultrasound is known to elicit turning behaviour, but only when the cricket is in flight. Turning would not save a cricket from a gleaning bat so we tested the hypothesis that AN2 elicits more appropriate antipredator behaviours when crickets are on the ground. The echolocation calls of Nyctophilus geoffroyi, a sympatric gleaning bat, were broadcast to singing male and walking female T. oceanicus. Males did not cease singing and females did not pause walking more than usual in response to the bat calls up to intensities of 82&nbsp;dB peSPL. Extracellular recordings from the cervical connective revealed that the echolocation calls elicited AN2 action potentials at high firing rates, indicating that the crickets could hear these stimuli. AN2 appears to elicit antipredator behaviour only in flight, and we discuss possible reasons for this context-dependent function.10abehaviour10acrickets10aescape10aorthoptera1 aHofstede, Hannah, T.1 aKillow, Joanne1 aFullard, James  uhttp://dx.doi.org/10.1007/s00359-009-0454-3