Figure 6From: On vision in birds: coordination of head-bobbing and gait stabilises vertical head position in quailMean amplitude (± s.d.) of E p and E k fluctuation ( ΔE p and ΔE k ) in experimental trials (HB), simulated trials without head-bobbing (no HB) and simulated trials with inversely timed head-bobbing behavior (inv. HB). A: ΔE p in vaulting trials; B: ΔE p in bouncing trials; C: ΔE k in vaulting trials; D: ΔE k in bouncing trials.Back to article page