Hi again Gregg,
the studies by Tsellarius were on wild populations, not captives held in tiny boxes of dirt, THAT`S what makes them so interesting and "real". The articles are not available to view online as far as I know, but I`d be most happy to PM you the titles etc, if you`d like to get copies from a library?
I think you still have much to learn, that`s in no way disrespectful, but unless you have more info you cannot make such broad statements. They don`t need spoken language to communicate, or to show cognative abilities, they ARE animals which have very clear learning abilities, beyond just acting on "instinct" as you claim!

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