不過,到底袋熊會如何對付不請自來的動物?澳洲生態學家 Dale Nimmo 在 The Conversation 撰文時指,暫時是未知之數,但這取決於是何種動物進入巢穴,因為袋熊一般不願與其他袋熊共享巢穴。然而,當一個地方的袋熊數量很高時,共享巢穴卻是常見之事。他又指 Barbara Triggs 在《袋熊》一書中曾記錄過袋熊將一隻狐狸從巢穴中趕出來,而在袋熊巢穴中找到的狐狸和狗的碎頭骨可顯示,並非所有入侵者都受袋熊歡迎。
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