Who ever that feller is, he would be called a "galah" here in Australia.
Very commonly in Australian English galah is used to refer to a fool or idiot. This figurative sense is recorded from the 1930s, and derives from the perceived stupidity of the bird. The following quotations give an indication of how the term is used:
Yes, they invited the PETA lady onto the show to talk about the claim that using animal names as a pejorative is damaging to animals, and when she obliged he accused her of having a poor perspective on what is truly important...