The Small Red Brocket (Mazama bororo) is a small species of deer in the Cervidae family. It is endemic to Atlantic Forest in Paraná and São Paulo in southeastern Brazil. This species, which only was scientifically described in 1996, is threatened by habitat loss. Though its size and structure most resemble that of the Pygmy Brocket (M. nana), its coloration is very similar to that of the Red Brocket (M. americana). It resembles hybrids between these two species even more closely, but differs from both, and their hybrids, in karyotype.

The Red Brocket (Mazama americana), is a species of brocket deer from forests in South America, ranging from northern Argentina to Colombia and the Guianas. It also occurs on the island of Trinidad in the Republic of Trinidad and Tobago (it also occurred on the island of Tobago until very recent historical times, but appears to have been extirpated there due to wanton poaching of wild game practiced on the island).

It formerly included the Central American Red Brocket (M. temama) and sometimes the Yucatan Brown Brocket (M. pandora) as subspecies. Considerable taxonomic confusion still exists for the populations remaining in the Red Brocket. Pending a solution to this, it has been evaluated as data deficient by the IUCN, though it, as presently defined, is the most widespread species of brocket. It is sympatric with the smaller Amazonian Brown Brocket over much of its range (the latter tends to have significantly lower population densities). The karyotype of the Red Brocket was initially described as having 2n = 68, FN = 74, and more recently as having 2n varying from 48 to 54 and FN varying from 54 to 56. This variability may indicate the presence of unrecognized species in the population.