Oh, that's delightful! Off the top of my head, some interesting facts about eagles are:

There are only 2 species of eagles in North America, the bald eagle and the golden eagleGolden eagles are used to hunt wolves in Mongolia.

Looking a little deeper, there are some other fun facts:
Juvenile golden eagles sound like Yorkshire terrier barks. You can hear what they sound like here: a rescued juvenile eagle is receiving a massage by its trainer at L'espieAgle, a Japanese non-profit foundation that focuses on Golden Eagles. ( sound here ).

On the other hand, bald eagles sound more like a seagull with its high-pitched whistling noise. Hollywood doesn't particularly think this is majestic, so oftentimes bald eagles are dubbed over with the sound of a red-tailed hawk instead.

Bald eagle ( here ), red-tailed hawk ( here ).

Unlike most other species, female eagles are larger than male eagles.

The harpy eagle is the design inspiration of Fawkes the phoenix in the Harry Potter films.

Sea eagles (also called ernes or erns), genera Haliaeetus, is possibly one of the oldest genera of living birds.

Interestingly, although eagles feature as a frequent symbol in art in most cultures, Chinese art does not commonly display eagles. When it does appear it symbolizes power, like most everywhere else in the world.

Here is a link to the sound that a bald eagle makes: sound of bald eagle.

I've heard that some of the US founding fathers objected to having the bald eagle as the country's mascot because it sounds like a seagull, not very scary. In many old movies, the sound of an eagle is actually replaced by the sound of a hawk so that it sounds more like a predator, and so that by association the US seems cooler.