While to some, this may seem crazy, but it is a wise move by the franchise. After all, Eagles are a member of the bird family. Creating a partnership with Angry Birds makes sense. When you look at other nicknames, such as the Giants or the Patriots, it would be hard to imagine them and Angry Birds creating a partnership.
Outside of the nickname aspect, just about everyone who owns a touch-screen phone has heard of Angry Birds. The majority of mobile users are iPhone, iTouch and iPad owners, and Apple announced in March that Angry Birds is the most downloaded app.
Although football fans and people, in general, are familiar with the Eagles football team, this is a good move for them, in terms of marketing. How could it not be?
Heck, it might even create a trend that gets fans, especially younger kids, to root for the Eagles as long as the partnership continues.
Overall, it is a smart move by the Eagles. You can certainly expect Angry Birds creators to coin a green eagle in their next release.