The long snout and massive Schwarzeneggerian front forelimbs identify this large frog as an adult breeding male Leptodactylus bolivianus.

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

When we saw this frog in the forest, the local staff identified it as the common species Leptodactylus pentadactylus. But when I was looking at my photos later, I realized that the longer snout and light area above the lip marked this as Leptodactylus bolivianus instead.

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