@misc{indiciaeb9cc76ff60ac,
  title = {Population trends of North American sea ducks as revealed by the Christmas Bird Count},
  author = {D.K. Niven and J.R. Sauer and G.S. Butcher},
  year = {2005},
  url = {https://pubs.usgs.gov/publication/5211310},
  note = {Source identifier: 5211310}
}