They may have a white patched triangle on their forehead and some have white sideburns. Their tail is very thick at the base. They are non-seasonal breeders and have a gestation period of 225 to 230 days. They give birth to one baby, which is dependent on her for the first two to three years of life. By the fourth or fifth month they start consuming solid foods.
Females usually give birth every three to four years.
They are often found in groups of up to thirty individuals, but this is usually broken up into smaller groups of three or four individuals. In most cases, males are more dominant and aggressive than females. Since they swing, move hand over hand while hanging, leap, and move bipedally and quadrupedally, they require a large cage that will accommodate all of this behavior. You can provide horizontal poles which permit swinging and branciating, lots of space between climbing structures to promote leaping, and platforms of varying widths to make space for walking upright and on all fours. CARE - DIET As with all monkeys, spiders need a varied and healthy diet.