Pigeon guano, also known as pigeon droppings, is a common sight in urban areas. While it may seem like a nuisance, there is actually a lot of scientific information to be discovered about this seemingly ordinary substance. In this article, we will explore the composition of pigeon guano, its distinct odour, and various techniques for its removal. By understanding the science behind pigeon guano, we can gain insights into its impact on the environment and human health, as well as find effective ways to manage its presence.