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<p>Evidence that birds can form abstract concepts such as <i>same
v. different</i> has been provided by <a
href="http://en.wikipedia.org/wiki/Alex_%28parrot%29"
title="Alex (parrot)">Alex</a>, the <a
href="http://en.wikipedia.org/wiki/African_Grey_Parrot"
title="African Grey Parrot">African Grey Parrot</a>. Alex was
trained by animal psychologist <a
href="http://en.wikipedia.org/wiki/Irene_Pepperberg"
title="Irene Pepperberg">Irene Pepperberg</a> to vocally label
more than 100 objects of different colors and shapes and which are
made from different materials. Alex could also request or refuse
these objects ('I want X') and quantify numbers of them.<sup
id="cite_ref-26" class="reference"><a
href="http://en.wikipedia.org/wiki/Bird_intelligence#cite_note-26"><span>[</span>26<span>]</span></a></sup></p>
<p>Macaws have been demonstrated to comprehend the concept of "left"
and "right." <sup id="cite_ref-27" class="reference"><a
href="http://en.wikipedia.org/wiki/Bird_intelligence#cite_note-27"><span>[</span>27<span>]</span></a></sup><sup
id="cite_ref-28" class="reference"><a
href="http://en.wikipedia.org/wiki/Bird_intelligence#cite_note-28"><span>[</span>28<span>]</span></a></sup></p>
I believe some birds exceed the capabilities of humans with regard
to counting. Twelve is the<br>
number I remember for some birds.<br>
<br>
<div class="moz-cite-prefix">On 12/29/2013 2:27 PM, eas lab wrote:<br>
</div>
<blockquote
cite="mid:CAN3-DLF8roGvTRmG_tCUqa93hVo3Mfyai8mSM-cRF+OA+7e-ew@mail.gmail.com"
type="cite">
<pre wrap="">Apparently apes can count to 3, but birds only to 2.</pre>
</blockquote>
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