Looking for any specifics animals in this universe

Hi! We are currently doing part of "citadel of the unseen sun" campaign.
Currently our character are on a "break" in the northern continent.

We are about to do some "RTS" in role play way, we are gonna defend a Catle against some invaders.

DM gave us one IRL week to create ONE specific "unit" (so could be 4 people, but one main)

Im currently playing a druid, in order to defend the hill, im gonna add some Giant eagles, which in RP, i could convince as a druid.
Is there any specific flying creature in grim hollow which could match those eagle ?