@misc{indiciaeb8cce28e0cff,
  title = {On the uniqueness of color patterns in raptor feathers},
  author = {D. H. Ellis},
  year = {2009},
  doi = {10.3356/jrr-08-07.1},
  url = {https://pubs.usgs.gov/publication/70035718},
  note = {Source identifier: 70035718}
}