What is a "hussar monkey"?

The red-tailed monkey, also known as the "hussar monkey" or "red-tailed guenon," is a medium-sized primate found in the dense forests of West Africa. It has a striking appearance with a reddish coat, long tail, and a black face with white fur surrounding its eyes and a distinctive crest of fur on its forehead. Red-tailed monkeys are arboreal and are known for their agility and acrobatics as they move through the trees. They are social animals, typically living in small groups, and feed on a diet of fruits, leaves, and insects.