Collared mangabey

Not applicable as a mythological being in the provided sources. The collared mangabey is presented in the cited materials as a biological species (Cercocebus torquatus) described by scientific taxonomy and conservation assessments rather than as a creature of mythic origin.

A medium-sized Old World monkey with overall grey fur, a prominent chestnut-red cap on the head and a contrasting white collar around the neck. It has striking white eyelids (earning the informal name "four-eyed monkey"), black ears, and a dark grey tail that exceeds body length and is often held with a white tip over the head. Adult head–body length ranges cited are roughly 45–67 cm depending on sex; reported captive weights are approximately 7.5–10 kg with males larger than females. Dentition includes relatively large incisors and long molars.

Described biologically rather than supernaturally: a diurnal, arboreal primate that lives in social groups of roughly 10–35 individuals with several males. Uses vocalizations (cackles and barks) for group contact and to signal position to other groups. Omnivorous and primarily frugivorous, its diet includes fruits, seeds, leaves, flowers, invertebrates, mushrooms, dung, and tree gum. Reaches sexual maturity at around five to seven years, with a gestation of about 170 days and reported lifespans in summary sources ranging roughly 14–30 years. Threats to populations include hunting for bushmeat and habitat loss; the species is listed as endangered on the IUCN Red List.