Boana nympha — Nymph Treefrog
Also known as:
Purplish Treefrog
This species was until 2017 placed in the genus Hypsiboas.
Santa Cruz Forest Reserve, Loreto, Peru—January 21, 2013
Nymph Treefrog (Boana nympha) Nymph Treefrog (Boana nympha)
This species was described by Faivovich et al in 2006 and thus isn't covered by any of my books on frogs of this area, since they are all older than that. Thanks to Dick Bartlett for identifying these frogs.

Here is a complete list of the herps I saw in the wild on my 2013 MT Amazon Expeditions trip.

Madre Selva Biological Station, Loreto, Peru—January 16, 2014
Nymph Treefrog (Boana nympha)
These frogs look kinda scrawny and underfed compared to the other treefrogs in the rainforest.

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

Santa Cruz Forest Reserve, Loreto, Peru—January 24, 2022
Nymph Treefrog (Boana nympha)
This one's got a stylish pattern.
Santa Cruz Forest Reserve, Loreto, Peru—January 29, 2022
Nymph Treefrog (Boana nympha) Nymph Treefrog (Boana nympha)
What big eyes you have, grandma!