@misc{indiciaed9f2bf26f158,
  title = {Food offering in jackdaws ( Corvus monedula).},
  author = {Selvino R de Kort and Nathan J Emery and Nicola S Clayton},
  year = {2003},
  doi = {10.1007/s00114-003-0419-2},
  url = {https://pubmed.ncbi.nlm.nih.gov/12743708/},
  note = {Source identifier: 12743708}
}