This frog was just a miniscule little speck, perhaps a centimeter long. It was in a shallow stream in a very dark area of the forest and was nearly impossible to see. Thank goodness for my 200mm macro lens and tripod. I originally tentatively identified it as Plethodontohyla minuta, but after poring over the 3rd edition of Glaw and Vences I only slightly less tentatively decided that it better fits the description of B, stumpffi, which is indeed one of the smallest frog species in the world.

Years ater, on iNaturalist, Madagascar frog expert Dr. Mark Scherz supplied an ID of "Mantidactylus, subgenus Brygoomantis", showing you approximately how good I am at identifying tiny Malagasy frogs.

Here is a list of all the reptiles and frogs I saw on this 2007 trip to Madagascar.