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Spatial vision in binocular and monocular common field grasshoppers (Chorthippus brunneus)

Abstract The ability of the common field grasshopper Chorthippus brunneus to discriminate between different distances under binocular and monocular stimulus conditions is investigated based upon the peering‐jump behaviour. The results show that information obtained from only one eye is sufficient for the grasshopper to determine the jump direction and distance. However, information obtained from both eyes is advantageous for relative distance determination. It is hypothesized that the motion parallax signals from the left and right eye may be summed, thus improving performance. There is no behavioural evidence of a more complex correlation of the information from the two eyes.