Let everyone else talk about 100 days, I want to explore the word "bird."
A Bird In the Hand
Flipping the Bird
The bird connection comes from hissing bad performances, also dating back to the ancient Greeks, which sounds like an angry goose. In the late 19th century hissing had come to be called "giving the bird." No one knows just how these two signs of contempt merged except it happened in the early 20th century.