The common marmoset (Callithrix jacchus) lived originally on the Northeastern coast of Brazil. Common marmosets are very small monkeys with relatively long tails. Marmosets have an arboreal locomotion similar to squirrels.
Common marmosets employ a number of vocal and visual communications. To signal alarm, aggression, and submission, marmosets use the "partial open mouth stare," "frown," and "slit-stare", respectively. To display fear or submission, marmosets flatten their ear-tufts close to their heads.
Living place: Brazil
Body weight: Males 256 g; females 236 g
Body height: Males 188 mm; females 185 mm
Number of offspring: two non-identical twins
Nutriment: plant exudates, insects and fruits
Lifetime: 10 years; captive- bred 16 years