@misc{indiciae132033d7c9bd,
  title = {The importance of Sky Islands in the annual cycle of the Western (Cordilleran) Flycatcher Empidonax occidentalis},
  author = {Charles van Riper and Harold F. Greeney},
  year = {2023},
  url = {https://pubs.usgs.gov/publication/70254271},
  note = {Source identifier: 70254271}
}