Mean occupancy in different zones of 4.2 cm circular arena with internal corners.

<p><b>A.</b> The internal corner arena was constructed with a cross placed in the center of a 4.2 cm circular arena. We considered two zones in this arena: cross and edge zone. The cross zone was a square sector positioned at the center while the edge zone was a annular region of width 0.6 cm along the boundary. <b>B.</b> The mean occupancies of the flies, both from simulations and experiments, in each zone are shown. The times spent in these zones by <i>Drosophila</i> were statistically similar to that from the two-component model. <i>Drosophila</i> showed a preference for the boundary over internal corners.