@misc{indiciae8549265c5b43,
  title = {Suspected Great Blue Heron population decline after a severe winter in the Columbia Basin},
  author = {Lawrence J. Blus and Charles J. Henny},
  year = {1981},
  doi = {10.2307/3534443},
  url = {https://pubs.usgs.gov/publication/5221725},
  note = {Source identifier: 5221725}
}