Guano is a valuable fertilizer rich in nutrients like nitrogen, phosphate, and potassium. Different types of guano have unique characteristics, such as fruit-bat guano containing dark organic material. Guano deposits in caves can indicate human absence and provide important information for archaeology. The presence of guano crusts suggests stable surface conditions without sedimentation. Future research should focus on studying phosphatic features, despite the challenge of identifying different bird species nesting in caves.