Albinism is reported with some regularity around Mount Kenya. Weight is around 7 to 14 kg. Colobus are capable of making great leaps in excess of 6 meters from one tree to another. Colobus have greatly reduced or absent thumbs on the hands. Primarily arboreal but will come to the ground.
Leaves are the primary diet, but fruit and other plant parts are eaten.
Colobus have large specialized stomach similar to animals like cows and sloths. A three chambered stomach with a large holding area slightly protected from the lower acid allows bacteria to break down cellulose and some toxins. Elevated amounts of saliva also hinder acids from disrupting the bacterial processing. Bachelor groups are also known. A single young is usually produced every 20 months although a set gestation is not commonly agreed upon.