@misc{indiciae3aa30aabd5f5,
  title = {"Wing-flapping" develops in wingless chicks.},
  author = {R R Provine},
  year = {1979},
  doi = {10.1016/s0163-1047(79)91885-5},
  url = {https://pubmed.ncbi.nlm.nih.gov/508221/},
  note = {Source identifier: 508221}
}