Figure 2 from: Wcislo W, Wcislo D, Vargas G, Ihle K (2012) Nest construction behavior by the orchid bee Euglossa hyacinthina. Journal of Hymenoptera Research 29: 15-20. https://doi.org/10.3897/jhr.29.4067

Figure 2 - Graphical representation of work effort showing how the bee moves from one side of the nest to another while constructing the envelope. Each arc represents the area the bee worked in a given work session, each lasting approximately from 1 to 2 min. The concentric arcs represent 13 sequential work bouts during a 26 min session of construction; the outer-most arc is the starting position at the beginning of the session and the inner-most one is the ending position.