Brazil takes pioneering action to rewild howler monkeys
Brazil has launched its first national population management program for the brown howler monkey, a species now ranked among the 25 most threatened primates on Earth after yellow fever outbreaks killed thousands. Coordinated across eight states, the program pairs a newly adapted yellow fever vaccine with strategic translocations to restore wild populations. In Rio de Janeiro’s Tijuca National Park, two groups of howlers now live in an urban forest where the species had been absent for over a century. The effort offers a potential model for other imperiled Atlantic Forest species.









