The following study is research on habitat selection of Eagles in Sweden:
Singh, Navinder J., Edward Moss, Tim Hipkiss, Frauke Ecke, Holger Dettki, Per Sandström, Peter Bloom, Jeff Kidd, Scott Thomas, and Birger Hörnfeldt. 2016. “Habitat Selection by Adult Golden Eagles Aquila Chrysaetos during the Breeding Season and Implications for Wind Farm Establishment.” Bird Study 63 (2): 233–40. doi:10.1080/00063657.2016.1183110.
Based on the classification system described in the tutorial, this source is academic, peer-reviewed research material.
This article was written by experts in the field. The researchers were employed by multiple departments of the Swedish University of Agricultural Sciences (SLU). The article also has in-text citations of many different papers from other studies. We can confirm that the article is peer-reviewed due to the mention of an anonymous reviewer in the acknowledgements of the paper. This is not a review paper; The researchers collected their own data and did not only compile the data from other papers.