Langurs are a group of long-tailed primates found primarily in the forests of South Asia. They belong to the family Cercopithecidae and are known for their distinctive features, including their slender bodies and expressive faces. Langurs are herbivorous, primarily feeding on leaves, fruits, and flowers, and they play a vital role in their ecosystem by aiding in seed dispersal. There are several species of langurs, such as the Hanuman langur and the Gray langur. They are social animals, often living in groups called troops, which can consist of several individuals. Langurs communicate through a variety of vocalizations and body language, helping to maintain social bonds within their groups.