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This is reported to be the largest frog in the world, with some individuals weighing well over 3 kilograms! In a sample of 15 individuals, weights ranged between 600 and 3250 grams, and snout-vent lengths were between 17 and 32 cm.The conspicuous tympanum has a diameter of about 0.5 cm and is separated from the eye by about 5 cm in an adult. A lateral fold extends from the eye to the posterior portion of the tympanum. Toes are fully webbed, with large interdigital membranes extending down to the toe tips, and the second toe is the longest. The skin on the dorsum and on top of the limbs is granular. Dorsal coloration is green sienna, while the abdomen and ventral part of the limbs are yellow/orange.