Why did Cai Kangyong put a bird on his shoulder when he presided over Kangxi?

He once said that it was a tribute to Hitchcock's film Birds.

When I presided over the first Golden Horse Award, I referred to the stills of Hitchcock's horror film Birds: Hitchcock put a bird on his shoulder and looked at it strangely. In order to pay tribute to the director Hitchcock, and also for this film, this shape was specially made.