The Little Bird first appears in Unintended Consequences, with one being used by enemies to attack Mother and Preacher when they try to escape from the docks. However, it gets destroyed by Preacher after he finds a SMAW to take it down with.
"Close air support can be provided by AH-6J Little Birds. Once a target is identified operators can expect a preliminary pass with miniguns and a follow up strike of Hydra rockets."
The AH-6J Little Bird is the Tier 3 Offensive Support Action for the Point Man class. Calling in a Little Bird puts a respectable amount of Minigun fire and rockets in-and-around the radius designated by SOFLAM. What distinguishes this from the Spec OpsA-10 Warthog is that, though the Little Bird doesn't drop as much ordinance as the A-10, it does come back for a second pass to mop up much of what it missed on the primary attack run.