Complex sentence: Its nocturnal habits lead it to seek food largely by smell, when moving about in the dark, it responds to tactual cues from the stiff whiskers (vibrissae) on its snout.
Split into simpler sentences: Its nocturnal habits lead it to seek food largely by smell. When moving about in the dark, it responds to tactual cues from its stiff whiskers (vibrissae) located on its snout.