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The most significant reintroduction work undertaken by the Fauna Division is related to Howler monkeys (Alouatta clamitans). Howler monkeys are social monkeys, living in groups of 2 to 11 individuals, and for this reason, before being released, it is necessary to form families of these animals. Howler monkeys' typical diet is of leaves and fruits, which makes howler monkeys important seed spreaders, helping to restore forests.
The reintroduction of these animals in existing release areas in the south of São Paulo is due to the irregular growth of the metropolitan region of the city, which causes the destruction of native forests where howler monkeys and other wild animals live. Most of the coexistence conflicts between urban advance and howler monkeys in the city of São Paulo occur in the northern limits of the city, along the Serra da Cantareira.
After release, monitoring work is carried out. The movement of howler monkeys in the woods can be monitored thanks to the use of necklaces that emit a radio signal, captured by a receiver. In this way, it is possible to monitor the activities of howler monkeys released by the Wild Fauna Division for several months, obtaining important information about their biology.
The work of reintroducing howler monkeys in the city of São Paulo is of great importance, as this work is directly related to the preservation of green areas of the Atlantic Forest in our municipality, including the survey of the flora associated with feeding howler monkeys. The effort of technicians from the Fauna Division in working with howler monkeys is reflected in the preservation of an entire biome that sustains biodiversity in the region of the city of São Paulo.
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