Rocs are most commonly white but can be a number of different colors, from dark brown or gold to black or blood red. Their massive feathers are highly prized, and their eggs even more so. Due to their scarcity and the high risk involved in harvesting them, a single man-sized roc egg can net 4,000 gp if transported to market undamaged. A roc can be trained as well as any other animal, but its great size makes this a daunting task for most would-be trainers of human size. The same isn't true for giants-particularly cloud and storm giants, who often use trained rocs as guardians for their lairs. Rocs are even large enough to serve as mounts for the most prestigious of giants.