What eats the kagu?

Introduced mammalian predators: Pacific rats (Rattus exulans), ship rats (Rattus rattus), Norway rats (Rattus norvegicus), black rats (Rattus rattus), feral cats (Felis catus), small Indian mongooses (Herpestes auropunctatus) and common myna birds (Acridotheres tristis) were introduced to New Caledonia, while a wild population of pigs (Sus scrofa) has persisted. All these species prey upon kagu eggs, chicks and adults, and are especially detrimental predators for nesting pairs.

Native predators: New Caledonian crows (Corvus moneduloides) are known to prey upon kagu eggs, while there are unverified reports of New Caledonian crows occasionally killing adult kagu. The crows will sometimes act as 'nest guardians', alerting their kagu neighbors of the presence of mammalian predators, including humans. In cases where the habitat of the kagu and New Caledonian crow overlap, the crow may be considered an umbrella species, where protecting it ensures the well-being of the kagu.