@misc{indiciaeaf1218a8a91c,
  title = {Swallows track human moves.},
  author = {Nigel Williams},
  year = {2006},
  doi = {10.1016/j.cub.2006.03.031},
  url = {https://pubmed.ncbi.nlm.nih.gov/16927457/},
  note = {Source identifier: 16927457}
}