コモンマーモセット
他のマーモセット属と同様、コモンマーモセットは鉤爪を持っている。例外は足の親指で、その指だけはその他の霊長類と同様平爪となっている。[8]マーモセットはリスのような樹上生活を送っており、樹に垂直に掴まったり、飛び移ったりする。また枝の上を四つ足で歩行する。[6][9]。鉤爪は、そのような行動様式に適応した結果だと考えられる。またマーモセット属と共通な特徴として、ノミのような形をした大きな切歯と食餌に適応した盲腸があげられる[6]
コモンマーモセット
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.[13] Marmosets have two alarm calls: a series of repeating calls that get higher with each call, known as "staccatos"; and short trickling calls given either intermittently or repeatedly. These are called "tsiks". Marmoset alarm calls tend to be short and high-pitched.[16] Marmosets monitor and locate group members with vibrato-like low-pitched generic calls called "trills".[21] Marmosets also employ "phees" which are whistle-like generic calls. These serve to attract mates, keep groups together, defend territories, and locate missing group members.[21] Marmosets will use scent gland on their chests and anogenital regions to mark objects. These are meant to communicate social and reproductive status.[13]