This monkey supplements its diet of sap with fruit, nectar, flowers and seeds, as well as spiders and insects.

The coloring of Wied's marmoset is mostly black, with white markings on cheeks and forehead.

Therefore, chimeric individuals exhibit a phenotype that is the result of more than one genotype, and potentially more than one father.

[4] Since chimerism changes the degrees of relatedness between individuals, it also changes the adaptive value of certain behaviors, like cooperatively raising young.

It has been proposed that chimerism creates a system that makes it evolutionarily advantageous for an individual to cooperate to raise its siblings; this closely matches to the way marmoset social systems have been observed to function in the wild.