They also eat small vertebrates like lizards and birds' eggs. There is also evidence that they too, may rely a great deal on gums and saps. True marmosets are found only south and east of a line formed by the Amazon and one of its main tributaries, the Madeira. Tamarins are found exclusively to the north and west of this line. Marmosets and tamarins only overlap in one small areas just south of the mouth of the Amazon where the silvery marmoset and the red-handed tamarin live side by side.
Marmosets are smaller.
Tamarins are larger. This even row of teeth make marmosets better at gouging holes in tree trunks to drink their sap. The difference between tamarins and Lion Tamarins are in their hands and ears. Read more about the Golden Lion Tamarin . Copyright Singapore Zoological Gardens Docents 2000.