Detection of Prey in Echocluttering Environments
Echolocating bat species foraging above canopies will face no severe difficulties in detecting flying insects. Bats foraging close to vegetations, over the ground or water surfaces, have to detect their prey within a clutter of time-smeared echoes reflected from foliages, grass, etc. By field observations, behavioural and neurophysiological investigations we have studied how two different groups of bats detect prey in echo cluttering environments: the gleaning bat, Megaderma lyra and three rhinolophoid species, Rhinolophus rouxi, Hipposideros speoris and Hipposideros bicolor which forage insects close to and within vegetation.
KeywordsWing Beat Prey Detection Pure Tone Signal Doppler Shift Compensation Multiunit Recording
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