@misc{indiciae8d9781c109b1,
  title = {Christmas Bird Count provides insights into population change in land birds that breed in the boreal forest},
  author = {D.K. Niven and J.R. Sauer and G.S. Butcher and W.A. Link},
  year = {2004},
  url = {https://pubs.usgs.gov/publication/5224484},
  note = {Source identifier: 5224484}
}