🔎參考資料:
Owen, M. A., Swaisgood, R. R., Slocomb, C., Amstrup, S. C., Durner, G. M., Simac, K., & Pessier, A. P. (2015). An experimental investigation of chemical communication in the polar bear. Journal of Zoology, 295(1), 36-43.
📖延伸閱讀:
‘How Do Penguins Feed Their Chicks?’
https://sciencing.com/penguins-feed-their-chicks-4567587.html