Every hole on a golf course carries its own par, or score based on the number of strokes in which a golfer is expected to finish the hole. A golfer who takes three strokes to finish a par 3 hole is said to have finished the hole on par. A number of additional golf terms are derived from the concept of par. For example, finishing one stroke over par is known as a bogey, while a double or triple bogey would constitute two or three strokes over par, respectively.
Conversely, finishing a hole one stroke under par is known as a birdie. Keeping in line with the avian imagery, golfers who finish a hole two strokes below par have achieved an eagle, and those finishing three strokes under par have recorded an albatross. The rarest single-hole score a golfer can achieve is known as a condor. Since most of the larger holes on a golf course rank as a par 4 or possibly a par 5, achieving a condor generally involves scoring an ace, or a hole in one. To date, only four golfers have managed to land officially recognized condors.