Another example of sensory exploitation is the case of the water mite "Neumania papillator", an ambush predator which hunts copepods (small crustaceans) passing by in the water column. When hunting, "N. papillator" adopts a characteristic stance termed the "net stance": its holds its first four legs out into the water column, with its four hind legs resting on aquatic vegetation; this allows it to detect vibrational stimuli produced by swimming prey and to use this to orient towards and clutch at prey. During courtship, males actively search for females; if a male finds a female, he slowly circles around the female whilst trembling his first and second leg near her. Male leg-trembling causes females (who were in the "net stance") to orient towards and often to clutch the male. This does not damage the male or deter further courtship; the male then deposits spermatophores and begins to vigorously fan and jerk his fourth pair of legs over the spermatophore, generating a current of water that passes over the spermatophores and towards the female. Sperm-packet uptake by the female would sometimes follow. Heather Proctor hypothesised that the vibrations made by trembling male legs mimic the vibrations that females detect from swimming prey. This would trigger the female prey-detection responses, causing females to orient and then clutch at males, mediating courtship. If this was true and males were exploiting female predation responses, then hungry females should be more receptive to male trembling. Proctor found that unfed captive females did orient and clutch at males significantly more than fed captive females did, consistent with the sensory exploitation hypothesis.