So, it all started while I was Archying in Un-goro. There was a parrot critter around me, and when the fragment appeared I accidentally clicked on the parrot, and it wolf-whistled me! I thought I was going nuts, and clicked on it again, this time it did a parroty sound. I got the fragment and started to click on the bird repeatedly, amused by the sounds. He makes several (at least 3) parroty sounds and then a wolf whistle.
I then brought out my pet Senegal and it made the same sounds

I was so happy, and decided to have Hyacinth Macaw as my Archaeology partner today, and Hyacinth made different sounds! Hers are somehow much more jungle-ish and high pitched bird sounds, no wolf whistle. Such nice sounds! I was very happy with both Hyacinth having such a pretty voice and the other parrots being cute and funny too.
Have you noticed? Was this old news? Which sound you like more?