The adult male frog measures about 94.0–170.0 mm in snout-vent length and the adult female frog about 102.7–154.0 mm. There is a light-colored line above the lip. Most of these frogs have some dark triangle-shaped marks. There is a black line from the nose over each eye. There are some marks between the eyes. The belly is light in color. In Peru and Ecuador, the youngest frogs have yellow color on their heads. The iris of the eye is bronze in color.[3]
Etymology
Scientists named the frog knudseni for Jens W. Knudsen, who wrote about biology.[3]
Habitat
This terrestrial frog lives on the ground and in burrows. It has been found in primary and secondary rainforest and savannas. Scientists have seen the frog between 0 and 1800 meters above sea level. Scientists saw the frog in many protected places.[4][3]
Reproduction
Scientists have only seen this frog's tadpoles in primary forest. They have observed the eggs in foam nests and tadpoles in shallow pools of water.[4]
Threats
The IUCN classifies this frog as least concern of extinction because of its large range and moderate adaptability to human disturbance. In some areas, logging may affect tadpoles.[4]
1234Diego A. Ortiz; Morley Read; Andrea Varela-Jaramillo; Santiago R. Ron (September 13, 2013). Santiago R. Ron (ed.). "Leptodactylus knudseni Heyer, 1972". AmphibiaWeb (in Spanish). University of California, Berkeley. Retrieved December 7, 2025.
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