RESUMEN
During the examination of a Great Egret (Casmeridus albus) when captured and taken to the Quinzinho de Barros Municipal Zoo in Sorocaba, state of Sao Paulo, seven arthropod were taken from the bird and put into ethanol at 70ºGL, and afterwards turned over to the Laboratory of Tick Morphophysiology and Pathogeny-Animal Sanity (LMPC-SA), of the Rio de Janeiro Federal Rural University. Animal's Parasite Study Department (DPA/IB/UFRRJ) where they were identified. These arthropod were then classified as belonging to the Hippoboscidae (Diptera, Pupipara) family. To make the genus and species identification possible it was necessary to prepare microscope slides for observation. The hippoboscidae were then identified as Ornithoica confluenta (Say), and sent to the Entomological Collection of the Instituto Oswaldo Cruz. This study is fit into the inter-institutional project that involves the PZMQB and the LMPC-SA/DPA/IB/UFRRJ