The majority of the paper with references are extremely relevant. It either includes information about the estuarine crocodile specifically, the geological conditions, or past studies in regards to transportation of marine and semi-marine animals. If the references section is looked at, again, the majority of sources are from scholarly journals or articles. There are a few instances that a book might have been used, such as Crocodiles of Australia or Crocodiles, however upon further research, they were found to be early journal articles. They also referenced a user manual that could be accessed online and a biostatistical analysis article. The larger sum of the references can be considered to be primary sources like the article I chose.
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