The need for complex questions in the study of mammals in Latin America, registration of Eptesicus fuscus in Boyacá, Colombia, Leucismo in Carollia in Costa Rica, tapir of Tapirus tapchaque mountain in Quindío, Colombia, records and natural history of Pattonomys semivillosus in Bolívar and Atlántico , Colombia, record of Leopardus tigrinus in Bosque Oriental de Bogotá, Potos flavus with severe dermatitis in Montes de María, Sucre, Colombia, New collection locality of Cryptotis tropicalis, Guatemala, Abundance of Marmosa xerophila and Marmosa robinsoni in La Guajira, Colombia, Traps camera as a tool to study mammals, QUYN: Platform for digital wildlife records, NAIRA III: a tool for processing and handling images from trap cameras, Fourth Latin American Congress and 8th Bolivian Congress of Mastozoology.