The fingers have basal webbing whereas the toes are half-webbed; both bear subtruncate discs at the tips of the digits.

The iris is grayish bronze and has a median horizontal reddish brown streak.

[2] Scinax exiguus occurs in margins of wetlands, marshes, and slow-flowing streams at elevations of 500–1,500 m (1,600–4,900 ft) above sea level.

Males call from grasses, and a couple in amplexus has been found in a bush about 1 meter above water.

[1] Scinax exiguus is a common species that is not facing significant threats.