Fauna
Species · GBIF taxon 11159062

Oksoko avarsan

Oksoko avarsan

Oksoko avarsan was an agile, feathered oviraptorosaur distinguished by its reduced forelimbs with only two functional fingers, showcasing an evolutionary trend toward hand reduction similar to tyrannosaurids. Multiple juvenile specimens discovered preserved closely huddled together provide striking evidence of communal resting and social flocking behavior. Equipped with a deep, toothless beak and lightweight frame, it navigated the river channels and lush floodplains of Late Cretaceous Mongolia.

PrehistoricFossilHerbivorous
—observations
—countries
—peak records
ExtinctConservation statusIUCN Red List categoriesLCNTVUENCREWEXExtinctRed List categories, explained →
Diet & prey
  • Seeds and nuts
  • Small lizards
  • Freshwater mollusks
Predators
  • Tarbosaurus bataar
  • Alioramus remotus
ThreatsApex tyrannosaurid predators and seasonal flooding events
HabitatsRiver floodplains and moist forest basins of the Late Cretaceous
Life span10–20 years
  1. FamilyOviraptoridae
  2. SpeciesOksoko avarsan
Range data is not available yet.
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Extinct prehistoric species known only from Late Cretaceous fossil remains.
Responsible observation
  • Fossil Observation: Inspect cast mounts to spot the distinctive two-clawed wing structure.
  • Museum Etiquette: Avoid touching mounted skeletons or fragile bone casts on exhibition.
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