The specific status of V. caerulivirens is further corroborated by its sympatry with V. indicus . The new species shares derived genital structures with V. indicus and V. melinus , but final conclusions on the systematic position within the V. indicus group seem to be premature since there is indication of still more undescribed taxa in this intensively evolving species group. The transects were then censused for the presence of pigmy rattlesnakes at 24-h intervals for the next 96 h. Survival of the larvae is ensured by the fact that the pair always spawns at the same site. They return at intervals of 5 to 7 days.
Pair bonding is the rule in areas with low frog densities.
The first eggs develop into tadpoles and later clutches of fertilized eggs serve as food. There is no apparent communication system between larvae and mother. After metamorphosis of the larvae the pair continues to lay eggs into the same leaf axils and these eggs also develop into tadpoles. This behavior is compared to that of other frogs that feed their tadpoles on eggs. It seems to be the least advanced mode of parental care involving tadpole feeding and demonstrates one of the initial steps that has led to more complex parental care behaviors in frogs.