Amazon River basin in the context of Tropical forest

Alfred Russel Wallace (8 January 1823 – 7 November 1913) was an English naturalist, explorer, geographer, anthropologist, biologist and illustrator. He independently conceived the theory of evolution through natural selection; his 1858 paper on the subject was published that year alongside extracts from Charles Darwin's writings on the topic. It spurred Darwin to set aside the "big species book" he was drafting and to quickly write an abstract of it, which was published in 1859 as On the Origin of Species.

Wallace did extensive fieldwork, starting in the Amazon River basin. He then did fieldwork in the Malay Archipelago, where he identified the faunal divide now termed the Wallace Line, which separates the Indonesian archipelago into two distinct parts: a western portion in which the animals are largely of Asian origin, and an eastern portion where the fauna reflect Australasia. He was considered the 19th century's leading expert on the geographical distribution of animal species, and is sometimes called the "father of biogeography", or more specifically of zoogeography.

Baños de Agua Santa (Spanish pronunciation: [ˈbaɲos ðe ˈaɣwa ˈsanta]), commonly referred to as Baños, is a city in eastern Tungurahua Province of Ecuador. Baños is the second most populous city in Tungurahua, after the capital Ambato, and is a major tourist center. Baños is known as the "Gateway to the Amazon," as it is the last city still located in the mountain region before reaching the jungle and other towns that are located in the Amazon River basin.

Baños is located at an elevation of 1,820 metres (5,971 feet) on the northern foothills of the Tungurahua volcano, whose activity has been characterized by frequent powerful ash explosions and lava flows that can be seen from Banos.