@misc{indiciaefda4da9229dc,
  title = {Southwestern Willow Flycatcher declines in Grand Canyon National Park},
  author = {M. J. Johnson and L. E. Ellison and M. K. Sogge},
  year = {1993},
  url = {https://pubs.usgs.gov/publication/70128748},
  note = {Source identifier: 70128748}
}