Bufo bankorensis is the largest species of frog found on Taiwan, with adult males ranging from 60-110 mm and females from 36.5-104 mm in snout-vent length. Head length is about the same as head width. Tympana are small, about 1/3 the size of the eyes, and partly covered by skin. Parotoid glands are present and shaped like kidney beans. The dorsal surfaces and limbs are warty. Hind limbs are very short. Webbing is present on four of five toes (Fei 1999).
Dorsal coloration varies and may be reddish, yellowish, greenish or dark brown. Patterning also varies, with some individuals having a dorsolateral black stripes, running beneath each parotoid gland. Black or orange-reddish dots may or may not be present. These frogs are reportedly also capable of metachrosis, or changing color (ymsnp.gov.tw).
Tadpoles are about 36 mm in total length, with the heads about 13.3 mm. Bodies and tails are blackish brown, with a gray tail tip (Fei 1999).
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