Science Fiction Animation Plastic Model Series No.24. The Klingon Bird-of-Prey was a type of warship in service with the Klingon Defense Force during the latter half of the 23rd century. It was gained its name from the unusual bird-like shape of its wings and long main hull. Birds-of-Prey are typically fitted with cloaking devices. Birds-of-Prey come in various classes such as the B'Rel scouts and the larger K'Vort cruisers.