NATURE'S IMAGES / SCIENCE PHOTO LIBRARY NATURE'S IMAGES / SCIENCE PHOTO LIBRARY
Amazon Gladiator Treefrog (Hyla boans) camouflaged while sleeping on a stilt-rooted palm root (Socratia sp.). This is one of the largest Amazonian treefrogs, reaching a body length of 5 inches. Over much of the Amazon Basin the males' loud, repetitive, booming nocturnal calls are a familiar night sound.
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