@misc{indiciaee1a0f4d85767,
  title = {Copulation by California condors},
  author = {S.R. Wilbur and J.C. Borneman},
  year = {1972},
  doi = {10.2307/4084220},
  url = {https://pubs.usgs.gov/publication/5224747},
  note = {Source identifier: 5224747}
}