They demand food. They will leave if you don’t have food they want, but return when you have enough. Pigeons only need very inexpensive food compared to the eagle.
They understand commands properly, but can’t read or anything. For example, to navigate a long distance, they have to know the way, or be given clear instructions based on landmarks they can see from up high.

Isnt it illegal to train a bald eagle in america without the right paperwork? Ill take the pigeons i guess.
The eagle comes with the paperwork pre stamped so you’re free to choose
Hmm okay probably the eagle then, id name them florence