Life History, Abundance, Activity, and Special Behaviors
For several Australian desert frog species, an adaptation to aridity is via the formation of a cocoon layer, where cytomorphosis occurs at the outer layer of the skin. This outer layer may be shed all at once as new deeper skin cells push outward (Tyler 1998). A. rotunda achieves hydration by burrowing into a soil layer with sufficient moisture content to maintain hydration balance during its diurnal burrowing; in fact, contact with soil moisture of as low as 1.5 percent is sufficient to achieve such hydration balance by skin osmosis (Cartledge et al. 1996).
A. rotunda feeds primarily on ants and other insects, and may travel about thirty meters on land in search of food; locomotion is by way of crawling rather than hopping (Government of Western Australia 2010).
In the austral spring, A. rotunda males begin to produce mating vocalizations. Anuran pairs of this species summer together (December to March) underground and then eggs are deposited in austral autumn (usually around the month of April) (Roberts 1984). A clutch of sizable creamy white eggs up to five millimeters in diameter are deposited in deep burrows up to 80 centimeters beneath the ground surface in moist sand. Minute frogs hatch from the eggs after approximately nine weeks, so that there is no tadpole phase (Tyler et al. 1994).