Prey Detection Using Different Senses
There are a variety of methods used to detect prey. Sensory systems used include the visual system, olfactory system (smell), auditory system (hearing) and the somatosensory system (such as touch). Some predators may use all of these senses in pinpointing their prey, while others may depend mainly or entirely on a single one. Detection methods may also be divided into direct detection of the prey organism itself, and indirect clues, such as the smell of its urine.
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—Friedrich Nietzsche (1844–1900)