Adult: Species description based on Savage (2002). Males to 31 mm, females to 48 mm. Dorsal: The color of the dorsal surface varies from gray to brown, usually infused with a reddish or greenish hue. Small, dark spots are sometimes present. A light, wide middorsal stripe is usually present. Dorsal surface slightly granular. Ventral: The ventral surface is white with a yellow or green cast. The throat is sometimes more gray, and may or may not have a single light line in the center. The ventral surface is smooth. Concealed surfaces: Rear surfaces of the thigh and groin are orange or red, without any mottling. Eye: Upper half of iris is grayish bronze, lower half is gray. The upper and lower portions are separated by a thin brown or red line. Extremities: This species has extensive webbing on the feet.
Habitat: Lowland, premontane, and lower montane forest to 2000 m. This species has also been found in disturbed areas (Savage 2002). Call: A chuck quickly followed by a chirp (Savage 2002). Type locality: Isla Bonita, eastern slope Volcán Poás (Costa Rica)
Diagnostic description: The legs have a thin webbing that extends at least to the first (proximal) subarticular tuber at least one side of the fingers and II usually in ll and IV. The legs have wide webbing between the fingers lll and lV extending almost to the last subarticular tubercle of finger III and up to half the distance between the first and penultimate subarticular tubercle of toe IV.
Hands exhibit two outer fingers (III-IV) with much larger than the finger disks l-ll; the outer discs are usually truncated and emarginate; lacks clear mask. The lips have light and dark bars. The posterior surface of the thigh is dark rusty brown. Adult males have nuptial pads on the thumbs and vocal slits.
The maximum standard length of adult males is 28 mm. females and 42 mm. in females.
Habitat: They live in the mulch, or in low vegetation along streams in primary forests.
Reproduction: Eggs laid on the ground have a direct development.
Feeding: They feed on Orthoptera, Diptera, isopods and centipedes.
Behavior: They are diurnal habits of the night.
Distribution in Costa Rica: In the lowlands and the middle Atlantic slope, center and south of the Pacific slope, between 10 and 2,000 m. Lift (Savage 2002).
Distribution outside Costa Rica: It is located in the northern part of Costa Rica, and then south and east through Panama to Colombia limit. It is located between 10 and 2000 m.