西内SINE

奥拉熟悉鸟类。当我在外面寻找岩石时，我看到它们会鸣叫，以警告入侵者。我觉得这比跟遇到的每个人对话要容易得多。如果你感兴趣的话，看看奥拉提供的一些关于这个主题的阅读材料。
Birds are Aura’s department, but when I'm outside looking for rocks, I’ve seen them sing to warn off intruders. I guess that’s easier than taking on every one that crosses your path. Aura came up with some reading matter on the subject if you’re interested.

艾略特·霍华德，《鸟类生活中的领地》
Eliot Howard, Territory in Bird Life

前辈阿尔图姆(1868)和莫法特(1903)也有类似的观察，尽管他们的想法在当时没有被接受。
Predecessors Altum (1868) and Moffat (1903) also made similar observations, though their ideas were not accepted at the time

恩斯特·迈尔，《伯纳德·阿尔图姆与领土理论》
Ernst Mayr, Bernard Altum and the territory theory

C. B.莫法特，《鸟类的春天之争》
C. B. Moffat, Spring rivalry of birds

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