Assertion: ibis's predator | /r/HasProperty | rat snakes
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Source sentences:
text: Other predators of eggs and young include the boat-tailed grackle (Quiscalus major), black-crowned night heron (Nycticorax nycticorax), gulls, and possibly vultures, as well as the common opossum (Didelphis marsupialis), raccoon (Procyon lotor), and rat snakes (Elaphe species).