Prey size selection and distance estimation in foraging adult dragonflies

@article{Olberg2005PreySS,
  title={Prey size selection and distance estimation in foraging adult dragonflies},
  author={Robert Olberg and Alton B. H. Worthington and Jessica L Fox and Chris Bessette and Michael P Loosemore},
  journal={Journal of Comparative Physiology A},
  year={2005},
  volume={191},
  pages={791-797}
}
To determine whether perching dragonflies visually assess the distance to potential prey items, we presented artificial prey, glass beads suspended from fine wires, to perching dragonflies in the field. We videotaped the responses of freely foraging dragonflies (Libellula luctuosa and Sympetrum vicinum—Odonata, suborder Anisoptera) to beads ranging from 0.5 mm to 8 mm in diameter, recording whether or not the dragonflies took off after the beads, and if so, at what distance. Our results… CONTINUE READING

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