The vast majority of what remains of the Atlantic Forest is currently fragmented, often isolated and without any conservation criteria or expansion plans. What's worse, this forest mosaic is little known and studied, both in terms of fauna and flora, making the preservation of this biome even more difficult. The purpose of this study was to fill in one of these gaps. Over a period of 14 months, the presence of wild mammals was studied using three camera traps in a fragment of Atlantic Seasonal Semideciduous Forest of approximately 145 hectares. The results obtained can be said to be surprising due to the diversity observed, especially in the Felidae family, and denote the urgent need for studies in this type of environment and, most importantly, a consolidated way of protecting them.