The Peruvian Amazon region is experiencing a number of impacts such as deforestation which results in loss of vegetation cover and consequently reduced habitat for wildlife. The aim of this study was to evaluate the entomological diversity in an ecosystem in a natural regeneration process (BS) and a primary forest (BP) in Bongará, Amazonas, Peru. The insects were collected using pitfall traps, with bait and malaise, which were arranged in a cross system having as midpoint the center of each area. The collection was made during three periods: dry, semi-dry and rainy. 18650 insects and 150 families distributed in 13 orders were classified. Those Orders who had a higher percentage of richness and abundance were, respectively, Diptera (24%; 45.2%), Coleoptera (24%; 26.4%) and Hymenoptera (21.3%; 14%). Comparing the two areas assessed, BP had a higher abundance compared to BS. The two most a...