Fig. 2From: Biological sex identification in the endangered dusky gopher frog (Lithobates sevosa): a comparison of body size measurements, secondary sex characteristics, ultrasound imaging, and urinary hormone analysis methodsExample of presence versus absence of nuptial pads on DGFs. Panel a: male with darkened patch on front digit typical of nuptial pad, as indicated by arrow. Panel b: female with no nuptial pad/dark patch on front digit. However, as can be seen in Panel b, females have spot patterns on their digits, which can, in some cases, complicate nuptial pad identificationBack to article page