black squirrel monkey (Saimiri vanzolinii)
black-capped squirrel monkey (Saimiri boliviensis)
common squirrel monkey (Saimiri sciureus)
Panamanian night monkey (Aotus zonalis)
gray-handed night monkey (Aotus griseimembra)
white-eared titi (Callicebus donacophilus)
black-fronted titi (Callicebus nigrifrons)
red-bellied titi (Callicebus moloch)
photographer: Brian Gratwicke, CC BY 2.0