<i>Drosophila</i> predator avoidance in a circular arena.

<p>(a) A diagram of the 8.2 cm diameter arena with a central cage of 4.5 cm diameter to hold the predators is shown. To measure avoidance, the time spent in the middle zone adjacent to the central cage was measured. Wild type Canton-S flies spend significantly less time in the middle zone when (b) a pantropical jumping spider (<i>Plexippus paykulli</i>) is present. Canton-S did not significantly avoid (c) the twin-flagged jumping spider (<i>Anasaitis canosa</i>). (d) Wild type Canton-S males did avoid a Texas unicorn mantis (<i>Phyllovates chlorophaea</i>) nymph, (e) but not a non-predator milkweed bug (<i>Oncopeltus fasciatus</i>). ** p < 0.01, *p <0.05. The middle line of each box plot represents the median, while upper and lower box display the 3^rd and 2^nd quartile respectively. The whiskers show the 90% confidence intervals.