Bird of Prey is a Ship Achievement for the Stealth Cruiser.
To earn this achievement, the ship must remain cloaked from the start of the volley until the battle is over and the after-battle text pops up. This can be difficult to do with level one cloaking, but level two or three makes it easier. Anti-Ship drones can be used to help unlock this achievement.
This achievement is easiest to do on the first sector with an upgraded (two bars) cloak and on the easy difficulty (that is due to the 5-hull points drones only appearing on this difficulty). Roam around the map looking for an automated scout with no shields and 5 points of hull. Let both weapons charge, cloak, fire lasers and align the beam on the bottom so that it just reaches three rooms. Achievement unlocked. Can also be done with the "double damage" effect of Hull Lasers on system-less rooms, or with a strong beam like Glaive Beam.
It is also achievable with no upgrades made if you fire both weapons first, then engage the cloak. This way the cloak takes no time-penalty but the weapons will still do damage, and the achievement is achievable with a level 1 cloak.
- This achievement is a reference to the Klingon Bird-of-Prey, a class of starship equipped with a cloaking device, which was featured in several Star Trek movies and television series. It may refer more directly to a specific Bird-of-Prey that appeared in Star Trek VI: The Undiscovered Country, which had the unique ability to fire photon torpedoes while it was cloaked.