The coverage attained by wild type flies and three mutant flies, norpA7, rut2080 and krz1, with habituation defects are shown. During the 10-min duration, the blind norpA7 flies attained the highest increase in the coverage. The krz1 flies with reduced exploratory drive attained the least coverage during the 5 minute duration. The rut2080 displayed similar increase in coverage to Canton-S for the first 4 minutes, but their increase rate exceeded that of Canton-S during the rest of exploration.