Interesting paper on the Spix’s Macaw

A very interesting paper is available on-line about the Spix’s Macaw. It is entitled " Qualitative description of the submission and agonistic behaviour of the Spix’s Macaw (Cyanopsitta spixii) with special reference to the displacement displays." It can be accessed via this link:

https://link.springer.com/.../10.1007%2Fs10164-020-00650-6

P,S As this link does not appear to function properly I have copied and pasted the text and placed it in the articles of the Spix’s Macaw,