The black-headed marmoset (Mico nigriceps) is a marmosetspeciesendemic to Brazil. It inhabits humid tropical rainforest, mostly second growth and edge; the distribution is not exactly known but is thought to be Rio dos Marmelos in the north and east, Madeira River in the west and Ji-Paraná River in the south. The threats are not exactly known but it may be near human traffic including the Trans-Amazonian Highway where cattle ranching and logging is occurring. It is not hunted but may be used as pets.
^Rylands AB & Mittermeier RA (2009). "The Diversity of the New World Primates (Platyrrhini)". In Garber PA, Estrada A, Bicca-Marques JC, Heymann EW & Strier KB. South American Primates: Comparative Perspectives in the Study of Behavior, Ecology, and Conservation. Springer. pp. 23–54. ISBN978-0-387-78704-6.