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One of these , the green burrowing frog ( " Scaphiophryne marmorata " ) , has a flattened head with a short snout and well-developed metatarsal tubercles on its hind feet to help with excavation .
 green burrowing frog
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 green burrowing frog