Cycloramphus faustoi

Cycloramphus faustoi are known from a small valley in a dry stream bed at elevations of 20–100 m (66–328 ft) above sea level. The stream is bordered by Atlantic forest. During the rainy season, the water trickles through this valley.^[1][2] Both males and females were spotted in rock crevices; they were wary and went into hiding when disturbed.^[2]

Reproduction seems to occur in August when, following a rainy afternoon, males were heard calling at night and a females found guarding an egg clutch consisting of 31 eggs; the female did not leave even when disturbed.^[2]

This species appears to be rare within its small range: it is known from an area of about 0.6 km² (0.23 sq mi), while the island itself is not much larger, 1.8 km² (0.69 sq mi); during a single night, at most 11 individuals could be found. This is less than for similar mainland species.^[1]

In the past, its habitat was threatened by fires caused by artillery training activities. This practice has now ceased, but climate change, in particular changes in rainfall, could threaten its habitat in the future. Also collection for illegal pet trade is a potential threat.^[1]