: The Tetragona clavipes (Fabricius, 1804) bees, knowing as “borá”, is found in all Brazil country
until south of Parana state. However in the São Paulo state, this species is not very common. Our main aim was, in São
Paulo University Campus at Ribeirão Preto, to realize the characterization of the flight activity of this bee, showing
possible relations some environmental factors, such as temperature, relative humidity and “A” type ultraviolet radiation.
Data were obtained during September and October months (Spring) and showed that there is a high correlation between
the start and finish of the flight activity and environmental temperature. However the UVA radiation and specially air
relative humidity did not show relevant role on this behavior and they were considered secondary factors.