You don't often see Eagles together, unless they're mating, dealing with the consequences of mating, or fighting.
Of course, there are a few more occasions when Eagles gather, and when they do, it's not as a congress (that's Crows), or a gaggle (that's Geese), or a colony (that's Gulls and Penguins), or a band (that's Jays), or a parliament (that's Owls), or a lamentation (that's Swans).
When Eagles convene, it's as a congregation.
This prompts me to ask how you will describe our gatherings when we group-up this fall.
Luke 12:24 - "Consider the birds."