DANTE FENOLIO / SCIENCE PHOTO LIBRARY DANTE FENOLIO / SCIENCE PHOTO LIBRARY
Included in the group of tree frogs known commonly as ''monkey frogs'', Phyllomedusa vaillanti is occasionally encountered in the upper Amazon basin. Vertical pupils are one of the common characters shared between all phyllomedusine frogs. This species is likely a complex of frogs that will someday be sorted out by taxonomists. This individual was photographed on a night hike at the CICRA research centre, Madre de Dios, Peru.
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