If excited or frightened a golden lion tamarin raises its mane, bares its teeth and calls out with high-pitched shrieks.
Golden lion tamarins have sharp nails. These nails help the monkey to move in and around and climb the trees easily.
Golden lion tamarins will share their meals with others in the group, either offering bits to the others or letting others steal from them.
Golden lion tamarin females usually give birth to twins. All the members of her group will help her to take care of the babies, but the dad helps the most.