Assassin's Creed 3 DLC lets Connor turn into an eagle because nature
In The Tyranny of King Washington: The Betrayal, Assassin's Creed 3's Ratonhnhaké:ton can turn into an eagle. This follows his previous invisibility cloak ability. Just saying, super-human feats are what make people stand out in a crowd, not sneak quietly through it with arm-blades.