Osteocephalus planiceps — Flat-headed Bromeliad Treefrog
The different Osteocephalus species in this area can be difficult to distinguish. I believe this one is Osteocephalus planiceps based on the relatively large tympanum, the dark bars across the back as well as the legs, and the dark radial lines in the iris.
Here's another big Osteocephalus, which I think is O. planiceps for the same reasons given for the previous photo.
I believe that the radiating lines in the iris, the relatively large tympanum, and the white supralabial area identify this frog as O. planiceps rather than one of the other local Osteocephalus species.
Two more big, attractive treefrogs poised to leap away. The first one here is probably the prettiest Osteocephalus I've ever seen.
- Bartlett, R.D., and Bartlett, P. 2003. Reptiles and Amphibians of the Amazon: An Ecotourist's Guide
- Rodríguez, L. O. and Duellman, W. E. 1994. Guide to the Frogs of the Iquitos Region, Amazonian Peru