Relatively little is known about the biology of the red-nosed stub-footed toad. It is a diurnal species, active during the day (3) (4), and is thought to live in forest away from water for most of the year. However, during the breeding season it migrates to streams to breed (2).
The red-nosed stub-footed toad begins to move towards its breeding areas in late April or May, with pairs often forming long before the toads move to the spawning area. Spawning occurs in May or June, and in some cases pairs have been known to remain in amplexus for up to 125 days (2). The large, unpigmented eggs of the red-nosed stub-footed toad are laid in chains in streams, where the tadpoles then develop (1) (2). As in other Atelopus species, the eggs are likely to be attached to rocks, and the tadpoles have suckers on the underside of the body which allow them to grip onto rocks in swift currents (3) (4).
The adult red-nosed stub-footed toad feeds on insects, especially beetles, as well as ants, fly larvae, caterpillars, mites and ticks (5).