**6. Patents**

Ethics approval and consent to participate: Animal Care and Ethics Committee (ACEC) of the Western Sydney University approved this retrospective study (Approval number: A12145). And we obtained consent from the Adelaide Koala and Wildlife Hospital to publish our research.

**Supplementary Materials:** The following are available online at http://www.mdpi.com/2076-2615/10/9/1500/s1, Table S1: Raw Data Related to Bird Patients.

**Author Contributions:** E.N. conceptualised this original research and collaborated with the Adelaide Koala and Wildlife Hospital. E.N. supervised undergraduate field project students K.J. and C.M. for this research project. R.C. is a postgraduate student in the "Stress Lab" (The University of Queensland, Gatton Campus), M.O.B. is a research assistant, and all of the named students provided assistance revising and formatting the manuscript prior to publication. All authors have read and agreed to the published version of the manuscript.

**Funding:** Research was supported through Western Sydney University and the University of Queensland start-up funds for Edward Narayan.

**Acknowledgments:** We wish to wholeheartedly thank the veterinary staff, nurses and volunteers of the Adelaide Koala and Wildlife Hospital, especially Phil Hutt and Joanne Sloanne. Thank you to the three anonymous reviewers and Vere Nicolson for valuable feedback during the revision of the manuscript.

**Conflicts of Interest:** The authors declare no conflict of interest.

**Availability of Data and Materials:** Clinical data on individual patients are held by the Adelaide Koala and Wildlife Hospital database which is not available to the public. Data relevant to this study are presented in the Results section.
