This species reproduced by budding, with a term of at least a month. Their equivalent of Human birth was apparently individuation, and after that the offspring were referred to as hatchlings. The number of hatchlings produced in a single individuation could range from at least two to twelve. During the budding process, it was advised for the parent not to come in contact with hazardous materials.
Background information Edit
This also implies that Vilix'pran's species cared for their offspring.
This species was never named and never linked to a species seen on screen, though because of this it also remains possible that it is a species we are already familiar with. In the end its existence is only extrapolated from Vilix'pran obviously alien characteristics.
Given the wings they may be a bird species, but the existence of hatchling ponds also seems to suggest a desire or need for aquatic environments in at least in the early stages of life. Though Vilix'pran was consistently referred to as he, budding in Earth species is generally linked to asexual reproduction, and thus it is conceivable that this race may only have one gender.