Fauna
Bird

Turtle-jawed Moa-nalo

Chelychelynechen quassus

Also known as Large Kauai Goose

Turtle-jawed moa-nalos were massive, flightless waterfowl uniquely adapted to fill the ecological niche of large browsing herbivores on prehistoric Kauai. Their exceptionally deep, blunt beaks closely resembled the jaws of tortoises, equipped to shear through tough fern fronds, fibrous twigs, and coarse leaves across the forest understory. Having evolved in isolation without native land predators, populations collapsed swiftly following human colonization and the introduction of non-native mammals.

FlightlessHerbivorous
Turtle-jawed Moa-nalo reference
(c) Apokryltaros, some rights reserved (CC BY) · cc-by
—observations
—countries
—peak records
ExtinctConservation statusIUCN Red List categoriesLCNTVUENCREWEXExtinctRed List categories, explained →
Key facts
Diet & preyFern fronds, Shrub foliage, Lowland herbaceous plants
Predators
  • Human (Homo sapiens)
  • Polynesian rat (Rattus exulans)
ThreatsOverhunting by humans, habitat destruction, and introduced mammalian predators
HabitatsLowland forests, coastal dunes, and shrublands
Life span15–25 years (estimated)
Classification
  1. OrderAnseriformes
  2. FamilyAnatidae
  3. GenusChelychelynechen
  4. SpeciesChelychelynechen quassus
Range & activity
Range data is not available yet.
Safe observation
Interaction riskLow
  1. Low
  2. Moderate
  3. High
  4. Very high
Why interaction risk is low
Extinct species; known exclusively from subfossil remains.
Responsible observation
  • Museum Exhibits: Observe subfossil bill elements preserved in natural history collections.
  • Heritage Sites: Visit public educational displays near the Makauwahi Cave reserve on Kauai.
Related species
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