1. Avens JS, Athearn RM, McNeal JH (1980) Egg production and efficiency of food conversion of Khaki Campbell ducks under different management systems. Br Poult Sci 21(5):333–337
2. Barry J (2015) How to recognize duck courtship displays. All about birds – Cornell University. https://www.allaboutbirds.org/news/what-to-watch-for-duck-courtship-video/. Accessed 09 June 2020
3. Bucklin RA, Jacob JP, Mather FB, Leary JD, Naas IA (2018) Tunnel ventilation of broiler houses IFAS Extension. University of Florida, Publication PS# 46. https://edisifasufledu/ps041. Accessed 20 Apr 2020
4. Clauer PJ, Skinner JL (2007) Raising waterfowl (Publication A3311). University of Wisconsin-Extension. https://www.canr.msu.edu/uploads/234/43487/livestock/raising_waterfowl.pdf. Accessed 20 Apr 2020
5. CSIRO (2002) SCARM report-83. Primary Industries Standing Committee – Model Code of Practice for the Welfare of the Animals – Domestic Poultry, 4th edn. CSIRO Publishing Australia