Large-billed Moa-nalo

Large-billed Moa-nalos, Thambetochen is a genus of extinct ducks known as moa-nalos. It contains two species:
 * Thambetochen xanion from Oʻahu,
 * Thambetochen chauliodous from Maui, Lānaʻi and Molokaʻi (Maui Nui).