Brocket deer are found in various parts of Central and South America, including countries like Mexico, Brazil, and Argentina. They inhabit diverse habitats within their range, including rainforests, dry forests, and even grasslands near wooded areas. Brocket deer are relatively small, with males (bucks) being slightly larger than females (does). They stand around 2 to 3 feet tall at the shoulder and weigh between 30 to 70 pounds. Their fur can be reddish-brown, gray, or black, and they often have a white patch on their throats or bellies. These deer have evolved to be secretive and elusive to avoid predators. They are well adapted for life in dense forests, with their small size and agile bodies allowing them to maneuver through undergrowth and vegetation.

Brocket deer are herbivores, primarily feeding on leaves, fruits, flowers, and tender plants found in their forested habitats. 

Female brocket deer typically give birth to one fawn, but twins can also occur. The fawns have spots on their fur that help camouflage them in the dappled sunlight of the forest. Brocket deer are mainly nocturnal, meaning they are most active during the night. They are cautious animals that prefer staying hidden in the vegetation to avoid predators like jaguars and pumas. They communicate through vocalizations, including high-pitched calls.

Some species of brocket deer are doing well, while others might be vulnerable due to habitat loss caused by deforestation and human activities. There is not sufficient data to determine if they are endangered. Conservation efforts aim to protect their habitats and ensure their survival.