Bert the Angry Bird?

You can find all sorts of vendors along Market Street in San Francisco. There are some people offering to shine shoes, people selling snacks, and people selling beanies. When I saw this beanie, I had to do a double take because I was confused whether this was supposed to be an Angry Bird or Bert from Sesame Street! For visual comparison, [link] Come to think of it, maybe Bert would be a fan of Angry Birds if the characters were replaced with pigeons!