When we look at our planet’s species distribution, we observe a very interesting pattern: as we move from the Poles to the Equator, the number of species drastically increases. This is what has been called ‘latitudinal gradient of species diversity’. In short, it means that tropical areas, which are located between the Tropic of Cancer and the Tropic of Capricorn, harbor a greater number of species than temperate areas. We still don’t know exactly what causes (or have caused) this phenomenon, but we know that it resulted in high endism, that is, a large number of animals and plants unique to these areas. The tropical areas of the globe are an intricate patchwork of various ecosystems. Tropical ecosystems can vary from rainforests to deserts; from savannahs to mangroves, and we have a lot to learn from them. However, in recent years we have witnessed an increase in rates of habitat destruction, particularly in the tropics. Currently, many tropical ecosystems are under threat, as vast areas are devastated to give space to cities, agriculture, and cattle farms. As tropical areas vanish, so do species previously unknown to us, as well as ecological processed specific to these environments. Moreover, due to its global importance, devastation of tropical areas has potential impacts on other non-tropical ecosystems, and may exacerbate climate change, as well as influence the spread of tropical diseases. On the other side of this battle, there are many scientists that dedicated themselves to the study of the fascinating tropical biodiversity. This collection of articles aims at highlighting their contributions to our understanding of tropical patterns and processed leading to this incredible biodiversity. It focuses on the wonders of the tropical areas of the globe, by asking, amongst others, the following questions: Which species of plants and animals are found in tropical areas? What can we learn about tropical ecology and how can this knowledge help us conserve these ecosystems for future generations?