Fig. 2. The responses of honeybees when presented with a choice between a flower occupied by a manipulated UV-absorbing crab spider and a vacant flower (left; N=28) and a choice between a flower occupied by a naturally white crab spider and a vacant flower (right; N=25; data taken from Heiling et al., 2003). The data show the percentage of times that honeybees first landed on the spider-occupied flower (black bars) or first landed on the vacant flower (white bars). Each bee was tested only once. **P<0.01.