Source: Jaime Jones
From Fallen - Destinypedia, the Destiny wiki:
The Fallen, known in their own language as the Eliksni, are an insectoid alien species, infamous for being notorious scavengers and raiders. (…)
The Fallen are a nomadic race of pirates and scavengers descended from a once-great civilization.
i’ve never played destiny; but over the past couple of weeks i’ve seen some concept art so cool it almost makes it worth playing