@misc{indiciae3fef277a2be1,
  title = {Adaptations to tidal marshes in breeding populations of the swamp sparrow},
  author = {R. Greenberg and Sam Droege},
  year = {1990},
  doi = {10.2307/1368236},
  url = {https://pubs.usgs.gov/publication/5223413},
  note = {Source identifier: 5223413}
}