Dorsal colouration is brown or olive green, and the dorsum bears an incomplete, dark-brown hourglass-shaped marking.

[2] The only known population inhabits montane tropical moist forest at about 1,060 m (3,480 ft) above sea level.

[1][2] Taruga fastigo is an arboreal species, and adults are typically are found on twigs and leaves in bushes up to 2 m (6 ft 7 in) above the ground.

[1] They typically occur close to shallow, stagnant pools where breeding takes place[1][2] (based on the presence of tadpoles—breeding has not been observed, but is presumed to involve a foam nest[2]).

Taruga fastigo is a rare species that is threatened by habitat loss and degradation.