The Birder Bluffs is a series of levels in King of Cards. Located in the so-called Birder Kingdom, it is a imperious mountain range, natural home of King Birder and all of the other Birders, with some ancient and mysterious ruins centered around said creatures, that the Birders themselves use as nesting grounds.
It consists mainly of four levels, those being Cyclone Sierra, the true King's Roost, one loot stage and a chest stage named King's Roost?. A good general view of the cliffs that compose the Birder Bluffs can be seen from the Void Crater, and many parts of the Bluffs overlap with the Flying Machine fleet in Heavyweight Heights.
The Birder Bluffs also appear in Showdown, but only the part named Shifting Balcony.