The smallest monkey, but not the smallest primate?
Pygmy marmosets reach a head-torso- length of 12-15cm and a weight of 100-120g. Thus they are still larger than e.g. mouse lemurs, the smallest primate, which are not counted as „true monkeys“. A group of pygmy marmosets are composed of a pair and their (even adult) offspring. To avoid inbreeding the dominant pair suppresses reproduction of the other group members by hormones and scents.
Age: up to 12 years
Sexually mature: at 2 years
Reproduction: mostly twin births
gestation period: 133-140 days
food: Tree sap, insects, spiders
habitat: tropical rainforests, especially temporarily flooded lowland rainforests
Danger: not endangered
distribution: western Amazon basin between Rio Japurá in the north and Rio Madeira in the east and south = parts of W-Brazil, S-Colombia, O-Ecuador, O-Peru and N-Bolivia