@misc{indiciaeb05ef0ad4a3e,
  title = {Geographic variation in the plumage coloration of willow flycatchers Empidonax traillii},
  author = {Eben H. Paxton and Mark K. Sogge and Thomas J. Koronkiewicz and Mary Anne McLeod and Tad C. Theimer},
  year = {2010},
  url = {https://pubs.usgs.gov/publication/70004700},
  note = {Source identifier: 70004700}
}