@misc{indiciaeb6a54c5441b8,
  title = {Population trends from the American woodcock singing-ground survey, 1970-88},
  author = {John R. Sauer and James B. Bortner},
  year = {1991},
  doi = {10.2307/3809154},
  url = {https://pubs.usgs.gov/publication/5222575},
  note = {Source identifier: 5222575}
}