Group-size distribution of skeins of wild geese.

  title={Group-size distribution of skeins of wild geese.},
  author={Yoshinori Hayakawa and Sho Furuhashi},
  journal={Physical review. E, Statistical, nonlinear, and soft matter physics},
  volume={86 3 Pt 1},
In appropriate situations, large populations of geese exhibit dynamical rearrangements by repeated mergers and splits among the groups. We describe the grouping process in terms of a mean-field model based on the Smoluchowski equation of coagulation with fragmentation and observationally plausible kernels. To verify our model, we conducted field observations on skeins of airborne geese, noting both the group-size distribution and the group-forming processes. We found that the group-size… CONTINUE READING