Napo Tropical Bullfrog

Males 22-24 mm, females 26-27 mm. The dorsal coloration consists of scattered dark markings on a brown background. There are two well-defined glandular dorsolateral folds on each side of the body. The distance from the eye to the snout is about one and a half times the diameter of the eye. The belly and throat are white. The lower and front surfaces of the thighs are yellowish. The iris is bronze.Similar species: Adenomera andreae differs by the distance from the eye to the tip of the snout being only about the diameter of the eye, its glandular dorsolateral folds being fine and difficult to see with the naked eye; its pectoral region and undersides of arms being darker than the belly. The posterior region of the belly and thighs are grayish in A. andreae.

Common at the edges of the Reserva Florestal Adolpho Ducke in Brazil, and in disturbed areas.

The species is terrestrial, active by day and night, and usually found in open areas and edges of forests. Reproduction occurs throughout the year, with a peak in the rainy season (December to May). The males call from the ground, hidden among leaves and fallen branches. Males excavate small burrows in the soil, in which the female deposits about 15 eggs in a foam nest. The tadpoles develop in the nest, living exclusively on the yolk provided in the eggs.

Adenomera hylaedactyla, the Napo tropical bullfrog, is a hyloid frog widely distributed throughout most of the Amazon basin, south to Argentina and Paraguay and occurring on Trinidad Island, Trinidad and Tobago.It is terrestrial, found up to 800 m asl in areas of open vegetation, such as stream and river edges and agricultural clearings. It is generally associated with primary and secondary forest, forest edges and savannah, in Trinidad). De la Riva (1993) indicated that the species has been found in human clearings, roadsides and ditches, and within secondary forest in Bolivia.

Females are slightly larger than males, reaching up to 2.7 cm (1.1 inches).Adults are nocturnal, and breed year round but especially in the rainy season.Females lay a brood of about 15 eggs in foam nests in burrows the males make in the ground; young develop in the nest with nutrition provided from yolk.

Adenomera hylaedactyla is a species of frog in the family Leptodactylidae. It is found in Argentina, Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Paraguay, Peru, Suriname, Trinidad and Tobago, and Venezuela. Its natural habitats are subtropical or tropical moist lowland forests, subtropical or tropical dry lowland grassland, rivers, swamps, intermittent freshwater marshes, pastureland, rural gardens, heavily degraded former forest, and canals and ditches.