Tailriskiin

Tailriskiin is a fictional species of small nocturnal arboreal mammal described in worldbuilding materials for the Vespera archipelago. It is notable for a long prehensile tail with bioluminescent tips used in social signaling.

Taxonomy and naming: Tailriska tailriskii, the binomial name, places the species in the genus Tailriska. Tailriskiin is the common name; the designation was introduced by explorer L. Kestrel in 2142.

Description: Adults measure 12–16 cm in body length, with tails of 26–34 cm and a mass of 90–150 g. Fur is brown with iridescent guard hairs. Large eyes suit nocturnal activity, and the tail carries luminescent membranes at the tip.

Distribution and habitat: Endemic to the montane forests of Nyssaea island in the Vespera archipelago, Tailriskiin favors canopy and mid-levels, often in tree hollows. Elevation range is roughly 200–800 meters.

Behavior and diet: Nocturnal and mainly solitary, individuals may gather during breeding. Diet includes fruit, insects, nectar, and seeds. Tail luminescence functions in signaling and courtship; tail-flagging and tapping are common displays.

Reproduction and life cycle: Breeding occurs in late winter to early spring. Gestation lasts about 40–45 days, yielding 1–2 offspring. Juveniles remain with the mother for several months before dispersal.

Conservation and research: In-world status is Near Threatened due to habitat loss and fragmentation. Protected reserves exist, and tailriskiin serves as a canopy-ecosystem indicator in studies of biofluorescence and forest health.

Etymology and cultural significance: The name derives from luminescent tail features; in worldbuilding lore it features in tales of twilight guardians.