Chiasmocleis bassleri

Bassler's humming frog ("Chiasmocleis bassleri") is a frog that lives in Colombia, Ecuador, Bolivia, Brazil and Peru.
The adult male frog is 16.8 to 20.3 mm long from nose to rear end, and the adult female frog is 19.5 to 21.6 mm long. This frog lives in primary and secondary forest no higher than 300 meters above sea level. It lives in the same places as other frogs with the same ancestor frog: "Chiasmocleis tridactyla", "Chiasmocleis antenori", "Chiasmocleis carvalhoi", "Chiasmocleis anatipes", "Ctenophryne geayi", and others.
This frog is a uniform brown-gray color on its back with black marks near its middle. It has pink spots on its sides.
It looks for food at night. It can dig in the ground to make burrows. Human beings have seen it on the ground and as high as 20 cm up in the plants.