@misc{indiciae1504b7b61c6e,
  title = {Key areas for wintering North American herons},
  author = {T. Mikuska and J.A. Kushlan and S. Hartley},
  year = {1998},
  url = {https://pubs.usgs.gov/publication/70020420},
  note = {Source identifier: 70020420}
}