The Saddleback Tamarin (Saguinus fuscicollis), also known as the brown-mantled tamarin, Spix's saddle-back tamarin, or Andean saddle-back tamarin, is a species of tamarin from South America. It is found in Bolivia, Brazil, Colombia, Ecuador, and Peru.
The Saddleback tamarin is sympatric with the pygmy marmoset, sharing the same habitat in South American counties, and will often raid the gum holes of this species.
Saddleback tamarins occupy an extensive area of northern Amazonia.