Assertion: ibis | /r/HasProperty | birds of the forest floor
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Source sentences:
text: Olson and James speculate that the genus was endemic to Maui Nui, that the ibises were birds of the forest floor, that because of their flightlessness they were susceptible to becoming trapped in lava tubes, and that they may have exerted heavy predation pressure on Maui Nui's land snails.