No country has more primate species than Brazil – over a hundred, from the very small saguis and the rare and famous golden tamarin/mico-leão dourado to the big and noisy bugios. They belong to five families: Callitrichidae (marmosets and tamarins), Cebidae (capuchins and squirrel monkeys), Aotidae (night or owl monkeys), Pitheciidae (titis, sakis and uakaris) and Atelidae (howler, spider and woolly monkeys). You can find detailed information about them in Portuguese in the website of the Centro Nacional de Pesquisa e Conservação de Primatas Brasileiros, related to the Ministry of the Environment.