The older twins aid in cooperative rearing by assisting in the raising of younger siblings. Groups may contain 1-2 immigrants Much of our understanding of the unique type of social regulation of reproduction in marmosets is based on work carried out at the Wisconsin Regional Primate Research Center since 1991. Unlike several of their close relatives, the common marmoset is currently not listed as a threatened species. The common marmoset is widespread and common in northeastern Brazil because of its adaptability to different habitats. Unfortunately, in some areas of its distribution, populations of the common marmoset are showing signs of decline due to habitat destruction.
Habitat destruction is the primary cause of extinction or threat of extinction for all animals.
Captive studies have taught scientists a great deal about the behavior and biology of the common marmoset. This information has been applied towards the protection as well as the captive and wild breeding of other closely related primates. This is a noninvasive technique designed to assist in breeding of wild and captive primates. Text and design by Kara Lascola.