A. perthensis usually has a redder background ground color than these other species and their spots fade, or become less distinct, as they mature. In contrast, the ground color is lighter in childreni and maculosa, while their spots stay better defined throughout their life.
A. perthensis has a distinctive reddish hue that becomes less intense with age, whereas other species retain their spot patterns. Conversely, childreni and maculosa have lighter backgrounds with more defined spots from birth to old age.