Rhombophryne vaventy is a large species of frogs of the Madagascar endemic microhylid subfamily Cophylinae.

[1][2][3] Rhombophryne vaventy is endemic to the Marojejy massif in northern Madagascar, where it was originally described from two individuals, captured at high altitude.

[4] Rhombophryne vaventy is found in montane rainforest at high altitude (~1,300 m (4,300 ft) above sea level) on the Marojejy massif.

It is a generalist predator, and its diet is known to include relatively large arthrosphaerid pill millipedes of the genus Zoosphaerium.

[4] It differs from R. serratopalpebrosa in its size, eye spines, skin texture, and numerous other characters.