@misc{indiciae16242ed75758,
  title = {Ravens, Corvus corax, differentiate between knowledgeable and ignorant competitors.},
  author = {Thomas Bugnyar and Bernd Heinrich},
  year = {2005},
  doi = {10.1098/rspb.2005.3144},
  url = {https://pubmed.ncbi.nlm.nih.gov/16087417/},
  note = {Source identifier: 16087417}
}