It holds an index finger on the face like a human; it is one of the most interesting parts about this video that the bird puts its toes on the mouth of the bird. He tells away Blue and his golden Macaw as "like a whistle like a king".
This two-year-old Harlequin Macau is in the mirror. This utensil does not just sound the copy. But this bird is so clever like nobody sees it. He has brought gestures in drama too, and he understands that the gesture and its sound go together.
Source - https://www.sunnyskyz.com/happy-videos/7129/Watch-This-Macaw-Shush-Another-Bird-For-Being-Too-Noisy