Dendropsophus marmoratus Marbled Treefrog
Some other names for this species:
Neotropical Marbled Treefrog
This species was formerly named Hyla marmorata, and many references still use that name.
Santa Cruz Forest Reserve, Loreto, PeruJanuary 19, 2014
Marbled Treefrog (Dendropsophus marmoratus)
These ornately patterned amplexing frogs were about seven feet off the ground, right next to the Santa Cruz facility's kitchen building. They were too high for me to get a very good photo, but it would have been quite rude to disturb these frogs in their private moment, so I had to settle for this photo.

Here is a complete list of the herps I saw in the wild on my 2014 MT Amazon Expeditions trip.

Nauta Road, Iquitos, Loreto, PeruJanuary 30, 2016
Marbled Treefrog (Dendropsophus marmoratus) Marbled Treefrog (Dendropsophus marmoratus)
These treefrogs sport orange or red-fringed bellies bespeckled with black. From above they look like modern art.

My Travelogues and Trip Lists page includes a complete list of the herps I saw in the wild on my 2016 MT Amazon Expeditions trip.

Online references:
Printed references: