Head and body length is 305-565 mm, the tail is 300-560 mm.
Weights of adults range from 1,100 - 3,300 g. White markings
on the face, throat and chest are characteristic of C. capucinus,
coloration elsewhere ranges from yellowish gray to grayish brown.
The tail is well haired and slightly prehensile, often slightly
curled at the tip.
C. capucinus is arboreal and diurnal, being flexible
in habitat choice. This species has been found in a variety
of forest types and at elevations of 2,100 m. in the western
Andes. In Costa Rica, C. capucinus has been found in
nearly every type of forest as well as mangroves and sparsely
forested areas. The diet is extremely varied and includes fruits,
nuts, berries, seeds, flowers, buds, shoots, bark, gums, insects,
arachnids, eggs, small vertebrates, and even some marine life
including oysters and crabs.
In coastal areas where C. capucinus is not hunted or
harassed, group size ranged from 20-30 individuals while in
disturbed inland forests groups where much smaller and more
leery of humans. Overall group sizes are between 6-50 monkeys.
These consist of more females than males, but the groups seem
to be dominated by a large older male. Usually one young is
born after a gestation period of about 180 days. The baby immediately
clings to its mother's fur with both hands and feet. If separated
from its mother, other individuals in the troop will respond
to its cries and give assistance. C. capucinus reaches
full size and sexual maturity at 4 years for females and 8 years
for males. Captive animals have been recorded to live to more
than 46 years old.
C. capucinus is found from W Ecuador to Honduras.